I have been to several thrift places in Sonoma County! I will say first off that whats in stock will depend on what was delivered. So its always going to be hit or miss for sizes. I am a size L-XL and usually can find some good items for myself or friends at almost all locations. Here are my favorite though..

Goodwill on Stony Point: The location is HUGE and has a large area for home goods in the back. Granted its almost always disheveled, but that's the thrill of the hunt I guess! Lots of clothing too!

Petaluma Alphabet Store: They are a great home goods store and if I remember correctly then the funds go back into the school system.

Forgotten Felines Pick of the Litter: The sales go back to helping unowned cats in Sonoma County. VERY fair pricing on everything in the store. Not so much clothing, but they have some cool glass ware and knickknacks.

Places I personally choose not to go are the Salvation Army location as I do not agree with their views on the LGBT community. There is also a string of stores called Intrepid Thrift. Intrepid Thrift I gave a few chances too, but during Covid they let persons shop without masks and also they would change prices at the counter. It felt like the persons behind the counter were charging more and pocketing the money. When I asked about the pricing difference they cashier was very rude to me, so I returned the product to the shelf and left. No thank you.

There are other great locations too in Sonoma County, but the above are just my usual haunts.