Oris Classic

Most Oris Classic references take a 20 mm watch strap: 68 of 155. The lug width follows the case size: 28 mm case → 14 mm, 29 mm case → 14 mm, 37 mm case → 18 mm and 42 mm case → 20 mm.

Shop 18 mm Shop 20 mm

Oris Classic lug width by case size

155 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
28 mm	14 mm	17	—	01 561 7650 4031, 01 561 7650 4034, 01 561 7650 4035
29 mm	14 mm	38	—	01 561 7650 4031-07 5 14 10, 01 561 7650 4031-07 8 14 10, 01 561 7650 4031-07 8 14 61
37 mm	18 mm	32	—	01 733 7578 4031, 01 733 7578 4031-07 5 18 10, 01 733 7578 4031-07 8 18 61
42 mm	20 mm	68	—	01 733 7594 4031, 01 733 7594 4031-07 5 20 12, 01 733 7594 4031-07 8 20 10

Questions about the Oris Classic

Do all Oris Classic case sizes take the same watch strap?

No. The lug width changes with the case size: the 28 mm case takes 14 mm, the 29 mm case takes 14 mm, the 37 mm case takes 18 mm and the 42 mm case takes 20 mm. Check your case diameter before you buy.

Every Oris Classic reference

Other Oris families

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

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