Natural Cork Flat Irregular Shaped 2.5" to 4"W x 5.5" to 6.5"L Suitable for Terrariums and more... Natural cork flat--Excellent for Terrariums or other Artistic endeavors. Irregular Shaped; Approximately 2.5" to 4"W x 5.5" to 6.5"L Uneven Surface ranging from ~ 0.5" to 1" in thickness