All my drawer side stock is nominally 11mm thick and 100mm wide.
Front and sides all the same height, I've put a 1/4" groove all the way around to hold the base which is 6mm ply.
I made the mistake of buying planed oak "to speed things up" By the time I got around to making the drawers they had moved a bit so had to put them through the PT anyway, so now about 10.6mm x 98mm. If your using a jig, its is easier if all the stock is identical in thickness and width, saves a lot of fettling later.
So far I've made 21 through dovetail drawers. I have about 19 to make for the utility, it was 14 but the missus keeps moving the goalpost.
I then have 12 half blind small drawers without sliders for teas etc.
Cheers
Andy