Galaxy Watch band sizes

Galaxy Watch bands fit within four families: 20 mm bands for Watch4 to Watch7, 22 mm bands for the Watch3 45 mm, Dynamic Lug bands for Watch8 and Watch9, and dedicated bands for Watch Ultra and Ultra2.

Official page: Samsung

Which Galaxy Watch bands fit which case. Yes: the maker lists them as compatible. Not listed: the maker does not say they fit.
Model20 mm bands (Watch4 to Watch7 era)22 mm bands (Watch3 45 mm, Galaxy Watch 46 mm)Watch8 and Watch9 bandsUltra bands
Galaxy Watch9 Not listedNot listedYesNot listed
Galaxy Watch8, Watch8 Classic NoNoYesNo
Galaxy Watch7 YesNot listedNot listedNot listed
Galaxy Watch6 YesNot listedNot listedNot listed
Galaxy Watch6 Classic YesNot listedNot listedNot listed
Galaxy Watch5, Watch5 Pro YesNot listedNot listedNot listed
Galaxy Watch4 YesNot listedNot listedNot listed
Galaxy Watch4 Classic Yes, third-party 20 mm bands may not fitNot listedNot listedNot listed
Galaxy Watch3 41 mm YesNot listedNot listedNot listed
Galaxy Watch3 45 mm Not listedYesNot listedNot listed
Galaxy Watch Ultra NoNoNoYes
Galaxy Watch Ultra2 NoNoNoYes

How the bands attach

On Galaxy Watch9, Watch8 and Watch8 Classic you detach a band by pressing the band button on the back of the watch (Samsung's Dynamic Lug System).

Official page: Samsung

Good to know

  • For Galaxy Watch4 Classic, Samsung warns that third-party 20 mm bands may not fit or connect properly because of the shape of the lug.

    Official page: Samsung

Common questions

What Samsung says, statement by statement

  • Samsung's Galaxy Watch9 bands are compatible with Galaxy Watch9, Galaxy Watch8 and Galaxy Watch8 Classic.

    Official page: Samsung

  • Samsung says the Galaxy Watch8 series uses a new dedicated attachment mechanism that is not compatible with bands from previously released models, and that bands are mutually compatible between Galaxy Watch8 and Galaxy Watch8 Classic.

    Official page: Samsung

  • Galaxy Watch7 has a 20 mm band connection and takes bands from Galaxy Watch6, Watch6 Classic, Watch5 and Watch4.

    Official page: Samsung

  • Samsung's Galaxy Watch Ultra2 bands are compatible with Galaxy Watch Ultra2 and Galaxy Watch Ultra, and use the Dynamic Lug System.

    Official page: Samsung

  • Galaxy Watch6 has a 20 mm band connection and takes bands from Galaxy Watch5, Watch4, Watch3 (41 mm), Watch Active2, Watch Active and Galaxy Watch (42 mm).

    Official page: Samsung

  • Galaxy Watch6 Classic has a standard 20 mm band connection and takes the same earlier bands as Galaxy Watch6.

    Official page: Samsung

  • Galaxy Watch5 and Watch5 Pro have a standard 20 mm band connection and take bands from Galaxy Watch4, Watch3 (41 mm), Watch Active2, Watch Active and Galaxy Watch (42 mm).

    Official page: Samsung

  • Galaxy Watch4 and Watch4 Classic have a 20 mm band connection and take bands from Galaxy Watch3 (41 mm), Watch Active2, Watch Active and Galaxy Watch (42 mm).

    Official page: Samsung

  • Galaxy Watch3 (41 mm) has a 20 mm band connection.

    Official page: Samsung

  • Galaxy Watch3 (45 mm) has a 22 mm band connection and takes Galaxy Watch3 (45 mm) and original Galaxy Watch (46 mm) bands.

    Official page: Samsung

  • Galaxy Watch Ultra can only be used with its dedicated bands: its band connection is 34 mm wide and is incompatible with any previously released Galaxy Watch bands.

    Official page: Samsung

  • Samsung Australia's support page says the Ultra line is only compatible with bands made for the Ultra line, and that standard 20 mm bands will not fit.

    Official page: Samsung

Band sizes for other smartwatches