Original Apple Watch band Inverness Green.

Such a strap is sold only at the official Apple store, and its price there is 99 GBP (that's approximately 110 euros).
Designed for large-sized watches. Watch case size: 42 / 44 / 45 / 49 mm.
Wrist size, wrist circumference (Braided Solo Loop) Size 4.
Brand new, in original packaging, never used.