Watch Almanac

Watch Almanac research

Case diameter is a poor guide to watch size

We compared case diameter with measured lug-to-lug for 198 round watches. Diameter explains about 49% of the variation in how long a watch is on the wrist, which means two watches with the same diameter can wear very differently.

394143454749515333353739414345Case diameter (mm)Lug-to-lug (mm)Baltic Aquascaphe Classic: 39 mm case, 47 mm lug-to-lugBaltic Aquascaphe GMT MK II: 39.5 mm case, 47 mm lug-to-lugBaltic Aquascaphe MK2 37mm: 37 mm case, 45 mm lug-to-lugBaltic Aquascaphe MK2 39.5mm: 39.5 mm case, 47 mm lug-to-lugBaltic Bicompax 002: 38 mm case, 47 mm lug-to-lugBaltic HMS 002: 38 mm case, 47 mm lug-to-lugBaltic Hermetique Tourer: 37 mm case, 46 mm lug-to-lugBaltic MR Classic: 36 mm case, 44 mm lug-to-lugBreitling Navitimer B01 Chronograph 41 AB0139211B1A1: 41 mm case, 47 mm lug-to-lugBreitling Superocean Automatic 42 A17375E71C1S1: 42 mm case, 47.7 mm lug-to-lugBrew Metric Chronograph Retro Dial METRIC-BLK: 36 mm case, 41.5 mm lug-to-lugBulova Precisionist X Sport 96B349: 44.5 mm case, 52 mm lug-to-lugCasio Duro MDV-106 MDV-106-1AV: 44.2 mm case, 48.5 mm lug-to-lugCasio Edifice Slim EFR-S108D EFR-S108D-2AV: 39.9 mm case, 44.8 mm lug-to-lugCertina DS Action Diver 43mm Powermatic 80 C032.607.11.051.00: 43 mm case, 51.4 mm lug-to-lugCertina DS PH200M Powermatic 80 C036.407.18.040.00: 42.8 mm case, 52.1 mm lug-to-lugCertina DS Super PH1000M C024.907.18.051.00: 43.5 mm case, 48 mm lug-to-lugCertina DS Super PH2000M C050.607.44.051.02: 43 mm case, 50.2 mm lug-to-lugCertina DS Super PH500M C037.407.18.050.00: 43 mm case, 48.2 mm lug-to-lugChristopher Ward C60 Trident GMT 300 40mm C60-40AGM31S0BW0-B0: 40 mm case, 47.5 mm lug-to-lugChristopher Ward C60 Trident Pro 300 40mm C60-40ADA31S0KK1-B0: 40 mm case, 47.5 mm lug-to-lugChristopher Ward C63 Sealander Automatic 39mm C63-39ADA4-S00K0-B1: 39 mm case, 45 mm lug-to-lugChristopher Ward C63 Sealander GMT 39mm C63-39AGM4-S00B0-B0: 39 mm case, 45 mm lug-to-lugChristopher Ward The Twelve 40mm C12-40ADA1-S00B3-B0: 40 mm case, 44.5 mm lug-to-lugCitizen Promaster Dive Eco-Drive BN0151-09L: 44 mm case, 48 mm lug-to-lugCitizen Tsuyosa Automatic NJ0150-56L: 40 mm case, 49.5 mm lug-to-lugDan Henry 1970 Automatic Diver 40mm DH70-40M-O12: 40 mm case, 45.7 mm lug-to-lugDoxa SUB 200T Professional 804.10.351.10: 39 mm case, 41.5 mm lug-to-lugDoxa SUB 250T GMT Professional 855.10.351.10: 40 mm case, 42.9 mm lug-to-lugDoxa SUB 300 Professional 821.10.351.10: 42.5 mm case, 45 mm lug-to-lugDoxa SUB 300T Professional 840.10.351.10: 42.5 mm case, 44.5 mm lug-to-lugFarer Lander IV GMT 36mm W-LCL: 36 mm case, 41.2 mm lug-to-lugFarer Lander IV GMT 39.5mm W-LAN-SGS: 39.5 mm case, 45 mm lug-to-lugFarer Resolute III W-RES-OPG: 39 mm case, 45 mm lug-to-lugGrand Seiko Elegance GMT SBGM221: 39.5 mm case, 46.9 mm lug-to-lugGrand Seiko Elegance Spring Drive SBGA407: 40.2 mm case, 48.5 mm lug-to-lugGrand Seiko Elegance Manual-Wind SBGW231: 37.3 mm case, 44.3 mm lug-to-lugGrand Seiko Evolution 9 Hi-Beat 36000 80 Hours SLGH005: 40 mm case, 47 mm lug-to-lugGrand Seiko Evolution 9 Spring Drive 5 Days SLGA009: 40 mm case, 47.9 mm lug-to-lugGrand Seiko Snowflake SBGA211: 41 mm case, 49 mm lug-to-lugGrand Seiko Heritage 62GS Hi-Beat 36000 SBGH351: 40 mm case, 47 mm lug-to-lugGrand Seiko Heritage 62GS Spring Drive SBGA413: 40 mm case, 47 mm lug-to-lugGrand Seiko Heritage 9F Quartz 37mm SBGX261: 37 mm case, 44.6 mm lug-to-lugGrand Seiko Sport 9F GMT SBGN027: 39 mm case, 45.9 mm lug-to-lugHalios Seaforth IV: 41 mm case, 46.5 mm lug-to-lugHamilton Khaki Aviation Pilot Auto 36mm H76215140: 36 mm case, 45 mm lug-to-lugHamilton Khaki Aviation Pilot Day Date Auto 42mm H64635140: 42 mm case, 51 mm lug-to-lugHamilton Khaki Field Auto 42mm H70555533: 42 mm case, 53 mm lug-to-lugHamilton Khaki Field Mechanical 38mm H69439931: 38 mm case, 47 mm lug-to-lugHamilton Khaki Field Murph 38mm H70405730: 38 mm case, 44.7 mm lug-to-lugHamilton Khaki Navy Frogman Auto 41mm H77455330: 41 mm case, 44 mm lug-to-lugIWC Pilot's Watch Mark XX IW328201: 40 mm case, 49.2 mm lug-to-lugIWC Portugieser Chronograph IW371605: 41 mm case, 48 mm lug-to-lugIslander Greenport 39mm ISL-250: 39 mm case, 47 mm lug-to-lugIslander Northport Automatic Dive Watch ISL-360: 40.5 mm case, 47 mm lug-to-lugLongines Conquest 38mm L3.720.4.92.6: 38 mm case, 46.8 mm lug-to-lugLongines HydroConquest 41mm L3.781.4.56.6: 41 mm case, 51.1 mm lug-to-lugLongines Legend Diver 42mm L3.774.4.90.2: 42 mm case, 52.6 mm lug-to-lugLongines Master Collection 34mm (2026) L2.450.4.73.6: 34 mm case, 41.5 mm lug-to-lugLongines Master Collection 39mm (2026) L2.949.4.73.6: 39 mm case, 46.1 mm lug-to-lugLongines Master Collection 41mm (2026) L2.950.4.73.6: 41 mm case, 48.7 mm lug-to-lugLongines Spirit 40mm L3.810.4.53.6: 40 mm case, 49.7 mm lug-to-lugLongines Spirit Zulu Time 39mm L3.802.4.63.6: 39 mm case, 47 mm lug-to-lugLorier Astra AST2-WHT-ND-BRAC: 36 mm case, 44 mm lug-to-lugLorier Falcon FAL4-BLK-ND-BRAC: 36 mm case, 44 mm lug-to-lugLorier Hyperion GMT HYP3-BLK-DT-BRAC: 39 mm case, 46 mm lug-to-lugLorier Neptune (Series V, no-date) NEP5-BLK-ND-BRAC: 39 mm case, 46 mm lug-to-lugMonta Atlas 168CH00SB: 38.5 mm case, 47 mm lug-to-lugNomos Glashütte Club Campus 38 735: 38.5 mm case, 48.9 mm lug-to-lugNomos Glashütte Club Sport neomatik 42 date black 781: 42 mm case, 52.3 mm lug-to-lugNomos Glashütte Metro 38 1108: 38.5 mm case, 45.3 mm lug-to-lugNomos Glashütte Metro Date Power Reserve 1101: 37 mm case, 43.6 mm lug-to-lugNomos Glashütte Orion 38 gray 384: 38 mm case, 48 mm lug-to-lugNomos Glashütte Tangente 38 164: 37.5 mm case, 47.7 mm lug-to-lugNomos Glashütte Tangente neomatik 39 140: 38.5 mm case, 47.3 mm lug-to-lugOmega Constellation 41 131.30.41.21.01.001: 41 mm case, 44 mm lug-to-lugOmega Seamaster 300 234.30.41.21.01.001: 41 mm case, 48 mm lug-to-lugOmega Seamaster Aqua Terra 150M 38 220.10.38.20.03.005: 38 mm case, 44.9 mm lug-to-lugOmega Seamaster Aqua Terra 150M 41 220.10.41.21.03.005: 41 mm case, 47.9 mm lug-to-lugOmega Seamaster Aqua Terra 150M GMT Worldtimer 43 220.10.43.22.03.001: 43 mm case, 50.3 mm lug-to-lugOmega Seamaster Diver 300M 210.30.42.20.01.001: 42 mm case, 49.9 mm lug-to-lugOmega Seamaster Diver 300M 007 Edition 210.90.42.20.01.001: 42 mm case, 49.6 mm lug-to-lugOmega Seamaster Planet Ocean 600M 42 217.30.42.21.01.001: 42 mm case, 47.5 mm lug-to-lugOmega Seamaster Planet Ocean 600M 43.5 215.30.44.21.01.001: 43.5 mm case, 49 mm lug-to-lugOmega Seamaster Railmaster 38 235.10.38.20.06.001: 38 mm case, 44.9 mm lug-to-lugOmega Speedmaster '57 332.10.41.51.01.001: 40.5 mm case, 49.6 mm lug-to-lugOmega Speedmaster Dark Side of the Moon 310.92.44.50.01.001: 44.3 mm case, 50 mm lug-to-lugOmega Speedmaster Moonwatch Professional 310.30.42.50.01.001: 42 mm case, 47.5 mm lug-to-lugOmega Speedmaster Moonwatch Professional (sapphire sandwich) 310.30.42.50.01.002: 42 mm case, 47.5 mm lug-to-lugOrient Bambino Version 7 38mm RA-AC0M03S30B: 38.4 mm case, 44 mm lug-to-lugOrient AA08 Diver RA-AA0810N39B: 41.8 mm case, 46.8 mm lug-to-lugOrient Kamasu RA-AA0003R39B: 41.9 mm case, 47 mm lug-to-lugOrient Mako II TAA02001B9: 41.5 mm case, 47 mm lug-to-lugOrient Ray II TAA02004B9: 41.5 mm case, 47 mm lug-to-lugOris Aquis Date 43.5 01 733 7789 4135-07 8 23 04PEB: 43.5 mm case, 51 mm lug-to-lugOris Big Crown Pointer Date 38mm Bullseye 01 754 7779 4061-07 5 19 25: 38 mm case, 45.5 mm lug-to-lugOris Big Crown Pointer Date 40mm 01 754 7798 4064-07 8 20 06: 40 mm case, 47.5 mm lug-to-lugOris Divers Sixty-Five 38mm Cotton Candy (steel) 01 733 7771 4055-07 8 19 18: 38 mm case, 48 mm lug-to-lugOris Divers Sixty-Five 40mm 01 733 7707 4065-07 8 20 18: 40 mm case, 48 mm lug-to-lugOris ProPilot X Calibre 400 01 400 7778 7155-07 7 20 01TLC: 39 mm case, 47 mm lug-to-lugPatek Philippe Aquanaut 5168G 5168G-001: 42.2 mm case, 49.8 mm lug-to-lugRado Captain Cook Automatic 39mm R32223213: 39 mm case, 45.5 mm lug-to-lugRolex Air-King 126900: 40 mm case, 48 mm lug-to-lugRolex Cosmograph Daytona 126500LN: 40 mm case, 47.8 mm lug-to-lugRolex Datejust 36 126234: 36 mm case, 43.3 mm lug-to-lugRolex Datejust 41 126334: 41 mm case, 47.6 mm lug-to-lugRolex Datejust 41 126300: 41 mm case, 46.5 mm lug-to-lugRolex Day-Date 40 228238: 40 mm case, 47 mm lug-to-lugRolex Deepsea 136660: 44 mm case, 51.5 mm lug-to-lugRolex Explorer 36 124270: 36 mm case, 43 mm lug-to-lugRolex Explorer 40 224270: 40 mm case, 46.5 mm lug-to-lugRolex Explorer II 216570: 42 mm case, 50 mm lug-to-lugRolex Explorer II 226570: 42 mm case, 50 mm lug-to-lugRolex GMT-Master II 126710BLRO: 40 mm case, 48.1 mm lug-to-lugRolex GMT-Master II 126720VTNR: 40 mm case, 48 mm lug-to-lugRolex GMT-Master II 126710BLNR: 40 mm case, 48 mm lug-to-lugRolex Land-Dweller 40 127334: 40 mm case, 46.5 mm lug-to-lugRolex Milgauss 116400GV: 40 mm case, 48 mm lug-to-lugRolex Oyster Perpetual 34 124200: 34 mm case, 40 mm lug-to-lugRolex Oyster Perpetual 36 126000: 36 mm case, 43.1 mm lug-to-lugRolex Oyster Perpetual 41 134300: 41 mm case, 47.3 mm lug-to-lugRolex Sea-Dweller 126600: 43 mm case, 51 mm lug-to-lugRolex Sky-Dweller 336934: 42 mm case, 50 mm lug-to-lugRolex Submariner 124060: 41 mm case, 47.6 mm lug-to-lugRolex Submariner Date 126610LN: 41 mm case, 47.6 mm lug-to-lugRolex Submariner Date 116610LN: 40 mm case, 47.6 mm lug-to-lugRolex Submariner Date 126610LV: 41 mm case, 47.6 mm lug-to-lugRolex Yacht-Master 40 126622: 40 mm case, 47 mm lug-to-lugRolex Yacht-Master 42 226659: 42 mm case, 50 mm lug-to-lugSeiko 5 Sports Field Sports Style SRPG27: 39.4 mm case, 48.1 mm lug-to-lugSeiko 5 Sports Field Sports Style 36mm SRPJ85: 36.4 mm case, 44.4 mm lug-to-lugSeiko 5 Sports SKX Sports Style GMT SSK001: 42.5 mm case, 46 mm lug-to-lugSeiko 5 Sports SNXS Series SRPK89: 37.4 mm case, 44.7 mm lug-to-lugSeiko 5 Sports SKX Sports Style SRPD55: 42.5 mm case, 46 mm lug-to-lugSeiko Diver's 200m SKX007 SKX007: 42.5 mm case, 46 mm lug-to-lugSeiko King Seiko KSK SJE105: 38.6 mm case, 45.8 mm lug-to-lugSeiko King Seiko KSK SPB279: 37 mm case, 43.6 mm lug-to-lugSeiko King Seiko KSK SJE089: 38.6 mm case, 45.8 mm lug-to-lugSeiko Presage Cocktail Time SRPB43: 40.5 mm case, 47.2 mm lug-to-lugSeiko Presage Cocktail Time 38.5mm SRPE45: 38.5 mm case, 45.4 mm lug-to-lugSeiko Presage Style60's GMT SSK009: 40.8 mm case, 47 mm lug-to-lugSeiko Presage Style60's Open Heart SSA425: 40.8 mm case, 47 mm lug-to-lugSeiko Prospex 1965 Diver's Modern Re-interpretation SPB143: 40.5 mm case, 47.6 mm lug-to-lugSeiko Prospex 1970 Diver's Modern Re-interpretation SPB317: 41 mm case, 46.9 mm lug-to-lugSeiko Prospex Alpinist SPB507: 39.5 mm case, 46.4 mm lug-to-lugSeiko Prospex Alpinist SPB503: 39.5 mm case, 46.4 mm lug-to-lugSeiko Prospex Alpinist SPB121: 39.5 mm case, 46.4 mm lug-to-lugSeiko Prospex Alpinist SPB209: 39.5 mm case, 46.4 mm lug-to-lugSeiko Prospex Alpinist SPB505: 39.5 mm case, 46.4 mm lug-to-lugSeiko Prospex Diver Samurai SRPB49: 43.8 mm case, 48 mm lug-to-lugSeiko Prospex Diver's 200m SPB103: 45 mm case, 52.6 mm lug-to-lugSeiko Prospex Diver's 200m SPB101: 45 mm case, 52.6 mm lug-to-lugSeiko Prospex Land Mechanical 38mm SPB249: 38 mm case, 46.2 mm lug-to-lugSeiko Prospex Sea Turtle SRPE93: 45 mm case, 47.7 mm lug-to-lugSeiko Prospex Speedtimer Mechanical SPB513: 39.5 mm case, 44.5 mm lug-to-lugSeiko Prospex Speedtimer Solar Chronograph SSC911: 41.4 mm case, 45.9 mm lug-to-lugSeiko Prospex Speedtimer Solar Chronograph 39mm SSC961: 39 mm case, 45.5 mm lug-to-lugSerica 5303-1 Dive Chronometer 5303-1: 39 mm case, 46.5 mm lug-to-lugSinn 103 St Sa: 41 mm case, 47 mm lug-to-lugSinn 104 St Sa I 104.010: 41 mm case, 47 mm lug-to-lugSinn 356 PILOT Classic W: 38.5 mm case, 45.3 mm lug-to-lugSinn 556 I 556.010: 38.5 mm case, 45.5 mm lug-to-lugSinn U1: 44 mm case, 47 mm lug-to-lugSpinnaker Bradner Automatic SP-5062-AA: 42 mm case, 50 mm lug-to-lugSquale 1521 Militaire (bracelet) 1521MIL.SQ20B: 42 mm case, 48 mm lug-to-lugStudio Underd0g Mantis (Gen2) 02MAHE_G2_M: 37.5 mm case, 46 mm lug-to-lugSwatch Omega x Swatch MoonSwatch Mission to the Moon SO33M100: 42 mm case, 47.3 mm lug-to-lugTAG Heuer Aquaracer Professional 300 Date 42 WBP5110.BA0013: 42 mm case, 48 mm lug-to-lugTAG Heuer Carrera Chronograph 39 Glassbox CBS2210.FC6534: 39 mm case, 46 mm lug-to-lugTAG Heuer Formula 1 Chronograph 44 CBZ2082.FT8096: 44 mm case, 47.3 mm lug-to-lugTAG Heuer Monaco Chronograph 39 CBL2111.FC6453: 39 mm case, 47.4 mm lug-to-lugTimex Expedition Scout 40mm T49963: 40 mm case, 48 mm lug-to-lugTimex Marlin Automatic 40mm TW2V44600: 40 mm case, 48 mm lug-to-lugTimex Q Timex 1979 Reissue 38mm TW2T80700: 38 mm case, 45 mm lug-to-lugTimex Q Timex Reissue Falcon Eye TW2T80800: 38 mm case, 44 mm lug-to-lugTimex Weekender 38mm T2N647: 38 mm case, 45 mm lug-to-lugTissot Gentleman Powermatic 80 Silicium 40mm T127.407.11.041.00: 40 mm case, 48 mm lug-to-lugTissot PR516 Powermatic 80 38mm T149.407.11.051.00: 38 mm case, 44 mm lug-to-lugTissot PRX Automatic Chronograph 42mm T137.427.11.041.01: 42 mm case, 53 mm lug-to-lugTissot PRX Powermatic 80 35mm T137.207.11.041.00: 35 mm case, 44.9 mm lug-to-lugTissot PRX Powermatic 80 40mm T137.407.11.041.00: 40 mm case, 51 mm lug-to-lugTissot Seastar 1000 Powermatic 80 40mm T120.807.11.051.00: 40 mm case, 46 mm lug-to-lugTraska Freediver 1187: 40.5 mm case, 48 mm lug-to-lugTudor Black Bay M7941A1A0RU: 41 mm case, 50 mm lug-to-lugTudor Black Bay 54 M79000N: 37 mm case, 46 mm lug-to-lugTudor Black Bay 58 M7939A1A0NU: 39 mm case, 47.8 mm lug-to-lugTudor Black Bay 58 925 M79010SG: 39 mm case, 47 mm lug-to-lugTudor Black Bay 58 GMT M7939G1A0NRU: 39 mm case, 47.8 mm lug-to-lugTudor Black Bay Chrono M79360N: 41 mm case, 49.9 mm lug-to-lugTudor Black Bay GMT M79830RB: 41 mm case, 50 mm lug-to-lugTudor Black Bay Pro M79470: 39 mm case, 47.2 mm lug-to-lugTudor Monarch M2639W1A0U: 39 mm case, 46.2 mm lug-to-lugTudor Northflag GMT M9140G1A0U: 40 mm case, 48.8 mm lug-to-lugTudor Pelagos 39 M25407N: 39 mm case, 47 mm lug-to-lugTudor Pelagos 42 M25600TN: 42 mm case, 50 mm lug-to-lugTudor Pelagos FXD M25707B: 42 mm case, 52 mm lug-to-lugTudor Ranger M79950: 39 mm case, 47 mm lug-to-lugZodiac Super Sea Wolf Ceramic ZO9592: 41 mm case, 51 mm lug-to-lug
Each dot is a round watch. Dashed line: best fit. Gold dots: the five that wear largest and smallest for their diameter.

What we found

Wears largest for its diameter

  1. Hamilton Khaki Field Auto 42mm H70555533: 42 mm case, 53 mm lug-to-lug (lugs add 11 mm)
  2. Tissot PRX Automatic Chronograph 42mm T137.427.11.041.01: 42 mm case, 53 mm lug-to-lug (lugs add 11 mm)
  3. Tissot PRX Powermatic 80 40mm T137.407.11.041.00: 40 mm case, 51 mm lug-to-lug (lugs add 11 mm)
  4. Longines Legend Diver 42mm L3.774.4.90.2: 42 mm case, 52.6 mm lug-to-lug (lugs add 10.6 mm)
  5. Nomos Glashütte Club Campus 38 735: 38.5 mm case, 48.9 mm lug-to-lug (lugs add 10.4 mm)

Wears smallest for its diameter

  1. Doxa SUB 300T Professional 840.10.351.10: 42.5 mm case, 44.5 mm lug-to-lug (lugs add 2 mm)
  2. Doxa SUB 300 Professional 821.10.351.10: 42.5 mm case, 45 mm lug-to-lug (lugs add 2.5 mm)
  3. Doxa SUB 200T Professional 804.10.351.10: 39 mm case, 41.5 mm lug-to-lug (lugs add 2.5 mm)
  4. Seiko Prospex Sea Turtle SRPE93: 45 mm case, 47.7 mm lug-to-lug (lugs add 2.7 mm)
  5. Doxa SUB 250T GMT Professional 855.10.351.10: 40 mm case, 42.9 mm lug-to-lug (lugs add 2.9 mm)

Same diameter, different watch

The shortest and longest lug-to-lug at each common case size:

CaseWatchesShortest lug-to-lugLongest lug-to-lugSpread
36 mm10Farer Lander IV GMT 36mm 41.2 mmHamilton Khaki Aviation Pilot Auto 36mm 45 mm3.8 mm
37 mm8Nomos Glashütte Metro Date Power Reserve 43.6 mmTudor Black Bay 54 46 mm2.4 mm
38 mm18Orient Bambino Version 7 38mm 44 mmOris Divers Sixty-Five 38mm Cotton Candy (steel) 48 mm4 mm
39 mm34Doxa SUB 200T Professional 41.5 mmNomos Glashütte Club Campus 38 48.9 mm7.4 mm
40 mm43Doxa SUB 250T GMT Professional 42.9 mmTissot PRX Powermatic 80 40mm 51 mm8.1 mm
41 mm31Hamilton Khaki Navy Frogman Auto 41mm 44 mmLongines HydroConquest 41mm 51.1 mm7.1 mm
42 mm26Orient AA08 Diver 46.8 mmTissot PRX Automatic Chronograph 42mm 53 mm6.2 mm
43 mm11Doxa SUB 300T Professional 44.5 mmCertina DS PH200M Powermatic 80 52.1 mm7.6 mm
44 mm10Sinn U1 47 mmRolex Deepsea 51.5 mm4.5 mm

Short-lugged and long-lugged brands

Median lug reach (lug-to-lug minus diameter) for brands with five or more measured round watches, shortest first:

  • Orient: lugs add 5.5 mm (5 watches)
  • Christopher Ward: lugs add 6 mm (5 watches)
  • Sinn: lugs add 6 mm (5 watches)
  • Omega: lugs add 6.9 mm (14 watches)
  • Seiko: lugs add 6.9 mm (28 watches)
  • Timex: lugs add 7 mm (5 watches)
  • Certina: lugs add 7.2 mm (5 watches)
  • Grand Seiko: lugs add 7.2 mm (10 watches)
  • Rolex: lugs add 7.3 mm (27 watches)
  • Oris: lugs add 7.8 mm (6 watches)
  • Baltic: lugs add 8 mm (8 watches)
  • Longines: lugs add 8.4 mm (8 watches)
  • Tudor: lugs add 8.8 mm (14 watches)
  • Hamilton: lugs add 9 mm (6 watches)
  • Tissot: lugs add 9 mm (6 watches)
  • Nomos Glashütte: lugs add 10 mm (7 watches)

What this means when buying

Shop by lug-to-lug, not diameter. Measure the flat top of your wrist, subtract about 4 mm, and look for watches at or under that number. The fit finder does this for every watch we've measured, and the watch size chart gives the number for each wrist size.

Method

Data: every watch in Watch Almanac with both a case diameter and a lug-to-lug, excluding non-round cases (Tank, Santos, Reverso, Ventura) and digital watches, whose “diameter” is a width. Dimensions come from manufacturers or from hands-on reviews that measured them, as labeled on each watch's page. Integrated-bracelet watches with a rigid first link use their as-worn length. The figures update as we measure more watches; last computed 2026-10-22.

Citing this? Please link to watchalmanac.com/research/lug-to-lug-vs-case-diameter.