Pot proportions and wall thickness

I’m still working on slab building and have been using ¼” (wet) slab thickness for up to
14” long rectangular pots. I'd like to hear peoples opinions on wall thickness - both in terms of aesthetics and structural integrity. At what size pot do I need to thicken my walls to, say, 3/8”? Also, should I thin them down to 1/8” for mame pots?

thanks,
Casey

1/4" wet seems a little thin to me for a 14" long pot. I would probably use 5/16" for 9 to 14" long, and 3/8" for up to about 20". That is mostly from an aesthetic standpoint. An out turned rim could have an edge that is thinner. The shallow 4-5" diameter pots I threw for glaze samples were about 1/4" or a bit thinner and I thought they looked good.