The prisms cast many lovely rainbows when in direct sunlight, which is very suitable as sun catchers for indoor window hanging and outdoor garden, backyard, porch, also perfect for wedding decorations, chandelier crystal parts, crystal for car mirror, Christmas tree decor and any crystal projects 2 Pack Crystal -they are 120mm in size. Crystal Gifts-Crystal suncatchers for birthday, Mother's day, Valentines day gift, Easter gifts for girls women mom grandma friends , beautiful rainbow makers, can DIY memorial gift also The top of the prism is drilled, so you can either thread yourself or use the tool to assist. Hang the crystal decor and it be super sparkly on a .