Question on a Chinese Chest Rig (Type 63 maybe???)

[Greatguns]

I have a Sporter I'm playing around with and have 4+ 5/10rnd Chinese mags and 3-30rnd mags. I am looking at the pictured chest rig (is it a type 63 rig?) to house the mags and want to know the dimensions of the small pockets? Basically if they will hold the 5/10rnd mags. They look a little small, maybe for grenades, but thought I'd ask. Any help is appreciated.