This button looks like Italian glass that's been transformed into a button, but it is a lightweight resin. Although this measures 1-1/4" from tip to tip, it is raised, so it will require a larger hole. It is smooth enough to be used on finely knit creations. 

Clothing Button - Resin - Black with Floral - Oval Shaped Half Ball - 3 pk

• 1.25" button - half ball loft
• Shank back
• Resin
• Package of 3 buttons