How to choose the size?
Original sets of accessories to the tent, produced according to German standards, looked like this.
Different types of German tent stakes (along with poles, accessory case and the tent). Pictures from gerhard03.blog61.fc2.com
From left to right: bag, stakes WW1, stakes WW2, poles, rope. Picture from mp44.nl
A cover made of pale-green fabric, a copy of the standart German peg-case (for a Zeltbahn). Genuine leather belts. Aluminium buttons. There is the ink stamp on the cover.
Pegs and other items (in addition to the case) are provided for illustration. You only buy a case (pouch).