Frederique Constant Slim Line FC-306G4S6
The Frederique Constant Slim Line FC-306G4S6 takes a 20 mm watch band.

Frederique Constant · Slim Line
- Lug width
- 20 mm
- Case diameter
- 40 mm
- Reference
- FC-306G4S6
- Family
- Slim Line
- Case material
- Acciaio
- Model
- Slimline Automatic Black
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: 40 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 40 mm case depends on how that case is shaped.
- Inside the Slim Line family the lug width is not one number: it runs 12, 18, 20 mm. This reference is the 20 mm one, so a band bought for another Slim Line may not fit it. Why the size changes inside a family →
- 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 Slim Line references
- Slimline Mini Yellow Gold / Silver / BraceletFC-200MCS5B
12 mm - Slimline Mini Stainless Steel / Silver / BraceletFC-200MCS6B
12 mm - Slimline Mini Yellow Gold / Silver / BraceletFC-200WHDS5B
12 mm - Slimline Mini Stainless Steel / Silver / BraceletFC-200WHDS6B
12 mm - Slimline Mini Yellow Gold - Diamond / Silver / BraceletFC-200WHDSD5B
12 mm - Slimline Mini Stainless Steel - Diamond / Silver / BraceletFC-200WHDSD6B
12 mm
Vintage Black Calfskin Leather Strap
Hammered Pink Strap with Ecru Stitching
Hammered Yellow Strap with Ecru Stitching
Red Suede Strap with Stitching — Milano Straps
Black Calfskin NATO Strap




