Aye Up,
Does it have to be a folder? - If not but you still need something smaller than a standard GS shovel have a look at the
short garden spades/shovels which are about
half the size of a standard shovel.
I've been issued with/using folders for decades and there is some real cr*p out there so be careful.
I've seen the hinges and rivets on the cheapos fail ridiculously quickly and the plastic handles and shafts on even the so called 'high-end' ones shatter (albeit on most occasions through misuse - they aren't meant to chop tree roots or hack at rocks!).
The shafts of the non folding short 'Russian' type entrenching shovels seem to wear and become loose quite quickly (especially if the socket isn't welded) and the replacement shafts made from a not too hard wood, easily broken if using the tool for prying.
So if it
has to be a folder it is +1 for the German army surplus one as per the image below -
but! -
Clean the hinge and lock
thoroughly of any grease after purchase (grit will stick to it) and
after use clean and re-oil them or they will become a pain in the backside to unlock when you next come to use them, especially if you have used them in sand/sandy soil and snow!
And don't overdo any prying with the pick or you might even break the shaft on those!