Doxa SUB 300 821.10.351.21
The Doxa SUB 300 821.10.351.21 takes a 20 mm watch band.

Doxa · SUB 300
- Lug width
- 20 mm
- Case diameter
- 43 mm
- Reference
- 821.10.351.21
- Family
- SUB 300
- Case material
- Acciaio
- Model
- SUB 300 Professional
- Year
- 2020
Bands that fit
Cut and stitched in Milano, in the width this watch takes.
Will a strap close on your wrist?
Set for this watch: 43 mm of case and 20 mm between the lugs. Add your wrist and see where a standard strap would close.
mm
Filled in with the case diameter, which is what we hold for this reference. Measure the watch tip to tip for the exact answer: it is usually a few mm more.
Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.
Sizing notes
- 20 mm is the gap between the lugs, so a 20 mm band goes in without adapters. Whether it sits flush against a 43 mm case depends on how that case is shaped.
- 20 mm is one of the common sizes: 15,081 of the 41,485 watches measured take it, which is why it is the width most bands are cut in. Every watch that takes 20 mm →
Other SUB 300 references
- SUB 300 Whitepearl / Bracelet821.10.011.10
20 mm - SUB 300 Whitepearl821.10.011.23
20 mm - SUB 300 Searambler / Bracelet821.10.021.10
20 mm - SUB 300 Searambler821.10.021.20
20 mm - SUB 300 Sharkhunter / Bracelet821.10.101.10
20 mm - SUB 300 Sharkhunter821.10.101.20
20 mm
Same lug width, other Doxa lines
- DOXA Army Army, Bronze BezelArmy, Bronze Bezel
20 mm - DOXA Army Army, Stainless Steel BezelArmy, Stainless Steel Bezel
20 mm - SUB 200 Sub 200 C-Graph AquamarineSub 200 C-Graph Aquamarine
20 mm - SUB 200 Sub 200 C-Graph II AquamarineSub 200 C-Graph II Aquamarine
20 mm - Sub 200 T.Graph II
20 mm - SUB 300 Ti5 Clive Cussler
20 mm
Black Saffiano Rubber Strap
Natural Calfskin NATO Strap
Single Pass Strap Pink — Hammered Calf
Saffiano Black Strap Tone Stitching
Saffiano Dark Brown Tonal Strap