Ring Holder is 12' in Diameter x 1.5" in Width x 1.75" in Height with an inside Diameter of 8.5-inches. OASIS Floral Foam DEGRADES in 567 days in an anaerobic environment. (ASTM D5511) Ring Holders are ready-to-use rings of Oasis Standard Floral Foam securely glued to a sturdy green plastic base Ideal for Advent wreath and holiday wreath making, as well as for creating centerpieces and smaller tribute pieces Encircle a bubble bowl with an elegant array of flowers for a spectacular display For use with fresh flowers. Soak in water before inserting flowers. Oasis Ring Holders feature Oasis Standard Floral Foam securely glued to asturdy green plastic base, and are ideal for Advent wreath making, holiday wreath making, centerpiece designing and more.