April Cornell Buttons – Red Square w/Rhinestones While most carded buttons come in a set of 4 or 5, these beautiful buttons designed by April Cornell are a set of eight (8) buttons! Buttons measure approx. 3/8″ in diameter and come packed on the designer card as shown. Rhinestone centers make buttons sparkle so pretty! Buttons make great embellishments on many sewing, crafting and quilting projects. See what a difference these buttons from April Cornell will make!