Black leather strap
The belt is 3 mm thick and made of croupon (the noblest part of the skin) and is 4 cm wide. It fits all trouser loops and measures about 120 cm. You adapt it to your waist, you just need a cutter and a device to make the holes (or a nail and a hammer).
The buckle is removable, so you can replace it with another classic buckle or an American buckle.