2050657905518347 1 Set Sax Pads Universal Saxophone Pads Goat Leather Pads Saxophone Button Pads Universal Generic Use For Alto Tenor Soprano SaxVarious specificationsSax Padsdiameterrange of 6mm-29mm 30mm-51mm Alto Eb Sax Size-diameter 48mm * 2 pcs; 42.3mm * 1pcs; 40mm * 2pcs; 38mm * 1pcs;36mm * 1pcs; 34mm * 1pcs; 32.2mm * 1pcs; 30mm * 3pcs26.2mm * 2pcs 24mm * 3pcs 18mm * 5pcs 14mm * 1pcs9mm * 2pcs Tenor Bb Sax Size-diameter(approximate) 52mm*2pcs; 48mm * 1pc; 43.8mm * 2pcs; 42.3mm * 2pcs;40mm * 1pc; 38mm * 3pcs; 36mm * 1pc;34mm * 1pcs32mm*2pcs 30mm * 1pc 28mm*1 20mm*4psc 18mm*2pcs 9mm*2pcs Soprano Bb Sax Size-diameter (around) 38mm * 2pcs; 34mm * 2pcs; 30mm * 1pcs; 26mm * 3pcs; 22mm * 1pcs;20mm * 1pc; 18mm * 2pcs; 15.7mm * 3pcs14.4mm*2pcs 11mm * 1pcs; 10mm * 4pcs 9mm * 3pcs 7.6mm * 3pcs total: 28pcs (Because the size is measured by hands, there may be individual pad size error, the size error is around 1mm, does not affect the sound, please rest aured.) How to obtain the diameter of the Sax, If you have already removed the padsyou can simply measuring them. If you do not have them measure the internal diameter of the key cup. In alternative measure the external diameter and the thickne of the side and than subtract from the external diameter the double of the side thickne. Example: If you measure the internaldiameter and the total is 30 mm, the diameter of the pad will be 30 mm.If you measure the external diameter of 31 mm and you have a side thickne of 0,5 mm the diameter of pad will be 31 mm - (0,5 mm x 2) = 30mm. Please note that Sax pads could be ordered with an increse of 0,5 mm till the size of 70 mm ( 9, 9,5 , 10,10,5 ... 70 ), afterwards the increase is of 1 mm (70,71,72 ...).