Beware of sizes

Reviewed by Sigvarde from Vt on Tuesday, October 24, 2017
My 30-pound IrishTerrier measures about 20” from ruff to rump, so I ordered the size 20. What I got is marked x-large, which I never would have ordered; it would fit a lab. Why doesn’t STP show mfr’s sizes? Quality-wise, it’s a three to four star: lightweight fleece, I’d still buy one of o could figure out the right size.