The collar is very close to the ones I've made in past for dobermanns: it's 6 cm wide (2" 3/8) and it tapers down to 19 mm (3/4") at the buckle.
The leash is the training one, adjustable to three different lengths and made from a 12 mm (1/2") wide leather strap.
Dark havana leather and solid brass fittings on both items.