The middle size tee has "925" and "Mexico" stamped on the top and measures 2 3/16". The 925 is a traditional indication that the item is made from 92.5% sterling silver and 7.5% copper.
Smallest tee has a skinny straight-pin type bottom and measures 1 1/2" long. It is stamped "JOA," "Sterling" and "Tax Mex" on the top, confirming what the design also indicates--it was made in Taxco, Mexico.
The 2 1/2" long metal tee has a heavy weight, but no markings. Possibly silver?