Ball marker, Mother's Day version, set of 2 with cat illustrations (available until 5/6) Diameter: 22mm, Thickness: approx. 3mm Suitable size for the Ground Golf Association's recommendations. This type can be attached to a magnet for portability. Magnets are not included, so please use a base with a magnet, such as a clip. These are handmade by me using resin. The inside is steel, and the back is finished with stainless steel foil. They sparkle and shine in the light, making them easy to find and perfect for various types of golf. How about a gift for your mother who plays golf? I also have 25mm markers and other handmade markers with different designs for sale, so please take a look. These are handmade by an amateur, so they are not as perfect as machine-made products, but please understand.