Frog Seashells - Bursa Bubo These are very pretty decorative pieces. Frog Shells (Bursa Rana) come in many shapes and sizes and these shells have beautiful markings and coloration. Creamy beige shell with brown spotting and marks over the entire shell. - 1 Frog Shell - Approx. size of 3.5-4 inches As these are natural sea shells they will have minor wear and variances in shape and color. Also, be aware that colors may vary from monitor to monitor. At this time we do not offer international shipping.