April Cornell Buttons – Crystal Square 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. 5/8″ in diameter and come packed on the designer card as shown. These crystal buttons sparkle so beautifully! Buttons make great embellishments on many sewing, crafting and quilting projects. See what a difference these buttons from April Cornell will make!