We have used these as replacements pearls for Bundy 2 and AS300 Saxophones but occasionally have to sand the pearl sides down slightly with fine sandpaper. Attach using your own adhesive.

Should fit either of the following keys: D,E,F, G,A or B

Approximately 15 mm, this is a universal item and measurements vary slightly with each pearl. 
Genuine Mother of Pearl inlays, not synthetic plastic like most aftermarket replacements being sold.