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Rolex Datejust 31

Every Rolex Datejust 31 reference takes a 16 mm watch strap: all 1,212 we measured.

Shop 16 mm

Rolex Datejust 31 lug width by case size

1,212 references measured. Updated 2026-11-03.

CaseLug widthReferencesWatch strap attachmentFor example
31 mm16 mm1,211—178158, 178158-0007, 178158-0008
not recorded16 mm1—278273-003

Every Rolex Datejust 31 reference

Other Rolex families

Inside each one the lug width often changes: it is the reference that decides.

All Rolex families → · Why the size changes inside a family →