Built 3 last week. Used 1x8's and 2x4's and 4x4's. 4x4's cut 32" for corners. sides and ends 32" high. 2x4 about 3 per side cut 32". Buiit 3 of them total size of each is 3'x10'. You can arrange them any way you want (straight line, U shape, etc.) rolled on a coat of water sealer when done. Total cost of lumber materials, screws, etc. about $400. May not be the fanciest looking garden, but it works. And it may not last 10 years, but I probably won't either. Looks like your pic but nothing sticking up from top of bed.