Slack Laces - Flat Elastic Shoe Laces for Athletes and Casual Wear - No Lace Lock, No Re-Tie FUN BRIGHT NEON SHOELACES - Slacklaces really POP! Great colorful laces that will add excitement to any shoes. WITH THE PERFECT AMOUNT OF STRETCH - You can AVOID discomfort from foot swelling, whether you are an athlete, working on your feet all day or have a health issue you can benefit greatly from Slacklaces. They expand and stretch as your feet swell elimating pressure and pain. EASY TO USE - Slacklaces are just like regular cotton laces that we are all familar with but they have just the right amount of stretch to provide the best user experience. So easy to use, they are fantastic for kids and the elderly. SIZING INFO: Extra Small (30 Inches), Fits Kids Size 4 to Adult Size 4; Small (35 Inches), Fits Adult Sizes 4 to 9; Medium (45 Inches), Fits Adult Sizes 9 to 13; Large (50 Inches) fits Adult Sizes 13 and bigger