Extra Small - Earphones Plus brand replacement earphone tips custom fit assortment: memory foam earbuds, triple flange ear tips, and standard replacement ear cushions For ear canal fitting earphones with connection size of approximately 11/64" (4.2mm) up to 7/32" (5.5mm) 2 pairs silicone tri-level tips, 6 pair silicone standard tips, and 2 pair memory foam earbuds Each model also sold separately on Amazon - click on the EarphonesPlus link above Please email Earphones Plus with any questions, we're happy to assist you with sizing! Same assortment in other sizes (use SKU as keyword): Small - S-TRI2-SQ2-B6-BLK; Medium - M-TRI2-SQ2-B6-BLK; Large - L-TRI2-SQ2-B6-BLK