slingshot pouch size

In my opinion, pouch size is crucial for slingshot shooting. The elements of pouch size should include pouch length, pouch wide, pouch taper and pouch thickness.
For those of you that mostly shoot 3/8" steel and use that size ball for small game and pest and rat hunting ... what size pouch do you use? I use the 55mm fiber pouch, the width is 2.5mm or 3mm. DANKUNG's liquidebullet pouch is 48mm, it's relatively small for my 3/8" steel balls, I use them occasionally. The pouches's shapes are various, rectangle, ellipse, and tapered. What I love the most the tapered with holes in pouch.Very big size pouch is also used, mainly for my ultra rifle slingshot which is designed to project 3 balls each shot.Pouch size is of safe too. For example, a thick leather pouch will not be able to wrap around the ammo well and your fork hits will go way up sharply because the ball can easily roll out.
These are my collection of slingshot pouch and their size in mm.
what's your opinion of slingshot pouch?

slingshot punch size A (below)
slingshot pouch die Model B (below)
slingshot pouch die Model C (below)
slingshot pouch die Model D (below)
slingshot pouch die Model E (below)
slingshot pouch die Model F (below)
slingshot pouch die Model G (below)
slingshot pouch die Model H (below)
slingshot pouch die Model I (below)
slingshot pouch die Model J (below)
slingshot pouch die Model K (below)
slingshot pouch die Model L (below)
slingshot pouch die Model M (below)
slingshot pouch die Model N (below)
slingshot pouch die Model O (below)