Just got the batch of jeans that I ordered for Swe-cha and the size is good. It took me a while to look for "husky" jeans for boys and these were at a good price point too ($8/pair at Target).
This brings back memories of those days when I'd have to look for pants that had elastic garters so that you can shorten the waist. These days, we need elastic that would do the opposite - expand!
He does feel chunky :) We should start calling him Twa-cha.