Description Reviews For the do it yourselfer, you won't find a more suitable material for making quality slingshots than Baltic Birch plywood. We only carry "A" grade premium Baltic birch. Each blank is 5"x7"x3/4" or 5"x7"x 1/4" and consists of 14 or 5 plys respectively. 1 Review 5 Best wood ever ! Posted by Guy on Nov 16th 2015 The wood is clear& the laminations are tight. Truly a grade A+ plywood.