Prada 2-Way Shoulder Bag Like New
W base width about 18cm ~ top about 20cm
H height about 15cm
D gusset width bottom maximum about 10cm
Height from handle
body to top about 10cm in the center
Attached shoulder length 
When using one snap at the longest (including metal fittings) about 130cm
at the shortest about 85cm
4 belt adjustment snaps about 14cm apart
For reference:
Total length without head about 157cm Neck circumference about 36cm
Shoulder width Total width including arms about 38cm
Armpit circumference about 77cm Bust top about 82cm
Waist about 58cm Belt circumference about 60cm