Mandala Arts Colorful Decal Window Sticker - 4.5" Double Sided - "Celtic Peace" by Bryon Allen (S58) Designed by Bryon Allen, these 2-Sided Window Stickers are printed in beautiful translucent colors. 4.5" round Window Stickers Peel-and-stick adhesive style backing. Apply to any smooth flat surface. Visible from both sides. Indoor or outdoor use.