Does lug width change within the same watch family?
Yes, and more often than not. Knowing the family is not enough to know the band size.
of the 698 watch families in the database use more than one lug width across their references. Families with at least five references, measured 2026-10-24.
Why it happens
A family is a name, not a case. It survives redesigns, size variants, ladies models and decades of production, and the case gets redrawn along the way. The Constellation has been in production since 1952: the name is the same, the gap between the lugs is not.
This is where wrong orders come from. Someone reads that a family takes 20 mm, orders 20 mm, and receives a band that is two millimetres too wide for the watch actually on the wrist.
The families that change the most
Each of these carries the number of distinct lug widths found across its references.
- Citizen Eco-Drive94 references671012131415161819202122232426
16 sizes - Omega Constellation310 references1214161717.5181920212224
11 sizes - Longines Heritage199 references1015161718192021222325
11 sizes - Oris Rectangular122 references1617181920212223242728
11 sizes - Longines DolceVita386 references12131516171920212326
10 sizes - Hamilton Jazzmaster366 references12141516171820222324
10 sizes - Oris Big Crown332 references14151617181920212223
10 sizes - Certina DS Podium183 references13141516171920212223
10 sizes
Check your own reference
Family averages are the reason people order the wrong size. Your reference has its own measured number, and it is in the database.
Search your referenceOther questions
- What size watch strap do I need?Width comes from the watch, length from your wrist. Every lug width in one chart, with the brands that use it.12–26 mm
- What is the most common lug width on watches?20 mm, on 36.4% of measured watches. What the rest of the distribution looks like.20 mm
- Can a watch have an odd lug width like 21 mm?One watch in six takes an odd size. 21 mm is not a rounding error.18.2%
- Does the case size tell you the strap size?No. At 42 mm, watches take 20 different lug widths, and the most common one covers only 39.3%.20 sizes