For most rooms, 8 foot (240 cm) long pieces are easier to work with. Quarter round is available at most home improvement stores.
Cut 2 joint pieces at 45-degree angles in the same direction (meaning both angled to the left, or both to the right). These joint pieces should fit together to form a flat line against the wall. Most corners will be 90-degree angles. For most corners, cut corner pieces at 45-degree angles in opposite directions (one to the left and one to the right, so that they fit together). For corners that are very different from 90 degrees, measure the angle with a protractor, and divide this number by 2 to determine the angle of your cuts. If your quarter round will end at an obstruction, cut at a 45-degree angle and attach a quarter round return.
A miter box and saw set can be purchased at most home improvement stores, or online. Remember to wear gloves and protective eye wear. Always exercise caution when using a saw.
You can purchase a miter box and saw set from most home improvement stores, or online. Wear gloves and protective eye wear. Always be careful when using a saw.