Longines La Grande Classique

Most Longines La Grande Classique references take a 18 mm watch strap: 132 of 444. The lug width follows the case size: 24 mm case → 13 mm, 29 mm case → 16 mm, 33 mm case → 18 mm and 36 mm case → 20 mm.

Shop 16 mm Shop 18 mm Shop 20 mm

Longines La Grande Classique lug width by case size

444 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
22 mm	13 mm · 16 mm on 7 · 20 mm on 7 · 18 mm on 5 · 14 mm on 1	32	—	L4.288.0.09.2, L4.288.0.09.6, L4.288.0.11.2
23 mm	12 mm	18	—	L4.191.6.11.0, L4.191.6.11.2, L4.191.6.11.6
24 mm	13 mm	75	—	L4.209.1.11.7, L4.209.1.11.8, L4.209.1.87.2
25 mm	13 mm · 12 mm on 1	9	—	L4.398.3.11.7, L4.398.3.12.7, L4.398.3.32.7
29 mm	16 mm	62	—	L4.308.0.57.2, L4.308.0.57.6, L4.308.0.87.2
30 mm	18 mm	29	—	L4.705.2.11.2, L4.705.2.11.7, L4.705.2.11.8
33 mm	18 mm	71	—	L4.691.6.11.0, L4.691.6.11.2, L4.691.6.11.6
34 mm	18 mm	18	—	L4.708.2.11.2, L4.708.2.11.7, L4.708.2.11.8
35 mm	20 mm	29	—	L4.786.2.11.7, L4.786.2.11.8, L4.786.2.11.9
36 mm	20 mm · 18 mm on 8	41	—	L4.755.1.91.2, L4.755.1.91.7, L4.755.1.92.2
37 mm	20 mm · 16 mm on 1 · 18 mm on 1	40	—	L4.766.2.11.2, L4.766.2.11.7, L4.766.2.11.8
38 mm	20 mm	11	—	L4.918.1.91.2, L4.918.1.91.7, L4.918.2.11.2
39 mm	16 mm	2	—	L4.766.7.58.4, L4.766.7.72.4
not recorded	20 mm	7	—	L4.866.4.11.2, L4.866.4.51.2, L4.866.4.51.6

References that take a different watch strap

L4.205.2.11.2: 20 mm, not the 13 mm of most 22 mm cases
L4.205.2.11.7: 16 mm, not the 13 mm of most 22 mm cases
L4.205.2.11.8: 16 mm, not the 13 mm of most 22 mm cases
L4.205.2.12.2: 20 mm, not the 13 mm of most 22 mm cases
L4.205.2.12.7: 20 mm, not the 13 mm of most 22 mm cases
L4.205.2.12.8: 16 mm, not the 13 mm of most 22 mm cases
L4.205.2.32.2: 16 mm, not the 13 mm of most 22 mm cases
L4.205.2.32.7: 16 mm, not the 13 mm of most 22 mm cases
L4.205.2.32.8: 20 mm, not the 13 mm of most 22 mm cases
L4.205.2.87.2: 18 mm, not the 13 mm of most 22 mm cases
L4.205.2.87.7: 18 mm, not the 13 mm of most 22 mm cases
L4.205.2.87.8: 14 mm, not the 13 mm of most 22 mm cases
L4.205.4.11.2: 20 mm, not the 13 mm of most 22 mm cases
L4.205.4.11.6: 16 mm, not the 13 mm of most 22 mm cases
L4.205.4.12.2: 16 mm, not the 13 mm of most 22 mm cases
L4.205.4.12.6: 18 mm, not the 13 mm of most 22 mm cases
L4.205.4.58.2: 18 mm, not the 13 mm of most 22 mm cases
L4.205.4.58.6: 20 mm, not the 13 mm of most 22 mm cases
L4.205.4.87.2: 20 mm, not the 13 mm of most 22 mm cases
L4.205.4.87.6: 18 mm, not the 13 mm of most 22 mm cases
L4.307.9.81.0: 12 mm, not the 13 mm of most 25 mm cases
L4.898.3.11.7: 18 mm, not the 20 mm of most 36 mm cases
L4.898.3.12.7: 18 mm, not the 20 mm of most 36 mm cases
L4.898.3.32.7: 18 mm, not the 20 mm of most 36 mm cases

And 7 more in the full list below.

Questions about the Longines La Grande Classique

Do all Longines La Grande Classique case sizes take the same watch strap?

No. The lug width changes with the case size: the 24 mm case takes 13 mm, the 29 mm case takes 16 mm, the 33 mm case takes 18 mm, the 36 mm case takes 20 mm and the 37 mm case takes 20 mm. Check your case diameter before you buy.

Can two Longines La Grande Classique watches with a 36 mm case take different watch straps?

Yes. Of the 41 Longines La Grande Classique references with a 36 mm case, 33 take 20 mm and 8 take 18 mm. The reference number decides, not the case size alone.