(Color: silver, white, (gold tone backs/workings). 5/16" or 8mm). I always try to point out any clear blemishes and condition. 0.25" = 1/4" or 6mm - pretty small for standard button holes. 0.38" = 3/8" or 9mm - also fits standard button holes.
SINGLES(2) 5/16" White MOP Round Vintage Formal Tux Prom Groom Shirt Stud a241
SINGLES(2) 3/8" White MOP Octagons Vintage Formal Tuxedo Prom Shirt Stud a214
SINGLES(2) 5/16" White MOP Round Vintage STAG Formal Tux Prom Shirt Stud a253
SINGLES(2) 1/4" White MOP Vintage Formal Tux Prom Groom Shirt Stud a263
SINGLES(1) 5/16" White MOP Springless Vintage Formal Tux Prom Shirt Stud m25
SINGLES(2) 7/16" White MOP Vintage Formal Tux Prom Groom Shirt Stud a235