Paua Abalone Curved Purfling / Rosette Strips for Guitars and Other Instruments Set of 16 Pcs 24mm(L) X 1.6mm(W) X 1.3mm(H) Total Length = 384mm or 15.11" Inner Diameter = 125mm (4.921") Natural paua shell is the most colorful abalone shell, with intense greens, blues and purples.