Omega Watches Under 40mm

2435 Omega models with a case width between 0mm and 40mm — compact sizing that suits smaller wrists and dressier looks. Each links to full specs and a wrist-fit check.

Model	Width	Thickness	Shape
Railmaster Omega Co-Axial Master Chronometer 38 / 60th Anniversary	38mm	—	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Blue / NATO / US Paralympic	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Blue-Waves / Bracelet	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Sedna Gold / Silver / Bracelet	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Sedna Gold / Silver / Rubber	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Blue / NATO / US Olympic	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Silver / Alligator	38mm	—	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Sedna Gold / Diamond / MOP / Bracelet	38mm	—	circular
Seamaster Aqua Terra 150M Master Chronometer 34 Stainless Steel / Sedna Gold / Grey-Waves / Alligator	38mm	—	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Sedna Gold / Blue-Waves / Bracelet	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Black / Bracelet	38mm	12.24mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Grey / Strap	38mm	14.7mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Silver-Waves / Bracelet	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Sedna Gold / Grey / Bracelet	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Sedna Gold / Diamond / Snow Sapphire / Alligator	38mm	—	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Grey MOP / Bracelet	38mm	12.4mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Diamond / Grey / Strap	38mm	14.7mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Sedna Gold / Diamond / Snow Diamond / Alligator	38mm	—	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Silver-Waves / Bracelet	38mm	12.24mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Blue / Bracelet	38mm	14.7mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Diamond / Blue / Strap	38mm	14.7mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Sedna Gold / MOP / Bracelet	38mm	12.24mm	circular
Speedmaster Co-Axial 38 Stainless Steel / MOP / Bracelet	38mm	14.7mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Diamond / Grey MOP / Bracelet	38mm	—	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Sedna Gold / Grey-Waves / Bracelet	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Black / Bracelet	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Diamond / MOP / Bracelet	38mm	—	circular
Speedmaster Co-Axial 38 Stainless Steel / Silver / Bracelet	38mm	14.7mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Grey / Bracelet	38mm	14.7mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Black / Bracelet	38mm	14.7mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / MOP / Bracelet	38mm	12.26mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Blue / Bracelet	38mm	12.24mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Yellow Gold / Diamond / Silver	38mm	14.7mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Blue / Alligator	38mm	—	circular
Speedmaster Co-Axial 38 Stainless Steel / Yellow Gold / Silver	38mm	14.7mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Black / Rubber	38mm	12.24mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Silver / Bracelet	38mm	12.4mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Sedna Gold / Cappuccino	38mm	14.7mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Diamond / MOP / Strap	38mm	14.7mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Silver / Strap	38mm	14.7mm	circular
Speedmaster Co-Axial 38 Stainless Steel / Diamond / Silver / Strap	38mm	14.7mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Grey / Bracelet	38mm	12.4mm	circular
Museum Collection N° 9 Olympic Official Timekeeper Co-Axial Chronograph	38mm	—	circular
Speedmaster Date 38 Stainless Steel / Diamond / Purple	38mm	—	circular
Speedmaster Date 38 Stainless Steel / Diamond / Purple / Bracelet	38mm	—	circular
Speedmaster Date 38 Stainless Steel / White / Bracelet	38mm	14.7mm	circular
Speedmaster Date 38 Stainless Steel / Grey / Bracelet	38mm	14.7mm	circular
Speedmaster Date 38 Stainless Steel / Diamond / MOP	38mm	—	circular
Speedmaster Date 38 Stainless Steel / Grey	38mm	—	circular
Speedmaster Date 38 Stainless Steel / Diamond / MOP / Bracelet	38mm	—	circular
Speedmaster Date 38 Stainless Steel / White	38mm	—	circular
Speedmaster Date 38 Stainless Steel / Red Gold / Diamond / Grey	38mm	14.7mm	circular
Museum Collection N° 9 “Milestone 1941”	38mm	—	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Green / Bracelet	38mm	12.4mm	circular
Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Green / Rubber	38mm	12.24mm	circular
Speedmaster Day-Date 39 Stainless Steel / Blue / Bracelet	38mm	—	circular
Dynamic III Chronograph Stainless Steel / Black / Yellow Coramide	38mm	—	circular
Dynamic III Chronograph Stainless Steel / Black / Brown Calf	38mm	—	circular
Dynamic III Chronograph Stainless Steel / Black / Brown Calf / Targa Florio	38mm	—	circular
Dynamic III Chronograph Stainless Steel / Black / Brown Calf	38mm	—	circular