I found the following western snap buttons shirt brands when visiting various local thrifts stores in September 2017.

Wrangler
Taos
Blue
American Eagle Outfitters
Abercrombie & Fitch
True Religion
Vintage
Moment of Truth
Miller
Hollister
Guess
George Straight
Gap
Emcee
Arizona Jeans
American Rag
Aeropostale
44mm

I found this Taos brand western snap button shirt at a thrift store.

I found this George Straight western snap button shirt at a thrift store.

I found this American Eagle Outfitters western snap button shirt at a thrift store.

I found this Guess snap button shirt at a thrift store.

I found this Hollister snap button shirt at a thrift store.

Here is Vintage snap button shirt made by Route 66 Original Clothing Company.

I found this American Rag snap button shirt at a thrift store.

I found this Wrangler western snap buttons shirt at a thrift store.

Moment of Truth western shirt with sawtooth flaps on front pockets.

I found this vintage Miller western snap buttons shirt at a thrift store. Miller Western Wear is out of Denver, Colorado.

I found this I found this Abercrombie & Fitch western snap button shirt at a thrift store.

I found this Blue western snap button shirt at a thrift store.

I found this orange True Religion western snap button shirt at a local thrift store.

I found this Aeropostale western snap button shirt at a thrift store.

I found this American Eagle Outfitter western snap button shirt at a thrift store.

I found this Emcee western snap button shirt at a thrift store.

Taos Western, “Putting the West in Western”, size medium

I found this American Eagle western snap button shirt at a thrift store.

I found this Arizona Jean western snap button shirt at a thrift store.

I found this 44mm (Legendary Work Wear) western snap button shirt at a local thrift store.

I found this Gap western snap button shirt at a thrift store.