Laser cut to the shape of the design Highly detailed embroidery, over three hours of embroidery machine time goes into this patch Black felt backing fabric Patch size: 12" W x 12.75" L Sewer friendly patch border for sew on application to leather 100% embroidery, no filler fabric Heat seal glue backing for iron-on application for denim or cotton Apply to jackets, vests, backpacks, car seat covers Sew on application is always recommended over iron on application. PATCH SHAMROCK SKULL LARGE