Vintage detachable buttons, probably made in the early 20th century.  Off-white colour.  These are detachable buttons - you attach them to your clothes with clips (not supplied). 
Size: Half an inch (14 mm) approx.

Condition: Vintage buttons, around a century old, and in fairly good condition (used).  They were not originally a matching set, as you can see, but they are very similar.  Some scuffing and marks.