Please note: For the correct size, you need to measure the outer dimension (diameter) of the leg. You can use our convenient measuring guide for this. Product Information This chair leg riser with felt is designed to increase the height of your chairs by 4.5 cm while providing protection for your floors thanks to the built-in felt. Suitable for chairs with round legs, these risers are a subtle and practical solution for those who want extra height for their seating furniture. The standard elevation is approximately 30mm and with a special intermediate piece the chair is raised by 45mm. Also suitable for angled legs up to a maximum angle of 30 degrees. Outer Dimension (mm) Inner Dimension (mm) 18 15 - 16 20 17 - 18 22 19 - 20 25 21 - 22 28 24 - 25 30 26 - 27 32 28 - 29 35 31 - 32 38 34 - 35 40 36 - 37 The chair leg riser is ideal for use in homes, offices, restaurants, or any other place where extra height for chairs is desired. The built-in felt also makes them ideal for use on wooden, laminate, or other hard floor surfaces where protection against scratches is important. Should the felt ever become worn, you only need to replace the cap with thread and felt. The part in the chair leg can simply remain in place.