HOW TO CHOOSE SIZE (See Video) Start by checking the back of your broken zipper slider; most zippers have a size number (1-10) embossed on the back of the slider. Once you know your zipper size, our sizing chart below will determine which FixnZip is right for you. If your zipper doesn’t have a number on the back, you can simply measure the width of the zipper teeth in millimetres or inches. SIZE GUIDE: -Small Zipper Slider: Teeth and Coil Sizes 1-4 -Medium Zipper Slider: Teeth and Coil Sizes 5-7 -Large Zipper Slider: Teeth and Coil Sizes 8-10. Don't know your zipper size number? Measure Teeth / Coil Width: 1 to 4. 5 mm or 0. 04 to 0. 18 in = Small, 5 to 7. 5 mm or 0. 19 to 0. 30 in = Medium, 8 to 10 mm or 0. 31 to 0. 40 in = Large The FixnZip is a replacement zipper slider that repairs zippers without tools or sewing. It has a patented spring plate design that enables it to fit over a range of sizes. Teeth or coil, metal or plastic, fixing zippers on jackets, bags, tents, clothing, car covers, wet suits, shoes, sleeping bags, jeep windows, etc. It supports sustainability in that it encourages reuse of products and is, itself, reusable. All parts are designed and manufactured in the USA. Easy to install, it can fix most items with zippers in minutes. Whether you spend your time in the backcountry or the back yard, you'll be prepared for any zipper repair emergency with Fix zip. The Fix n' Zip is a zipper slider replacement that repairs zippers without tools or sewing. It has a patented spring plate design that enables it to fit over a range of sizes; teeth or coil, metal or plastic, fixing zippers on jackets, bags, tents, clothing, car covers, wet suits, shoes, sleeping bags, Jeep windows, etc. It can even realign broken zipper teeth. It supports sustainability in that it encourages reuse of products and is, itself, reusable. All parts are designed and manufactured in the USA. Easy to install, it can fix most items with zippers in minutes. To find your zipper size: most zippers have a size number (1-10) embossed on the back of the slider. / small zipper slider: teeth and amp; coil sizes 1-4/ medium zipper slider: teeth and amp; coil sizes 5-7/ large zipper slider: teeth and amp; coil sizes 8-10Small works on sizes 1-4, examples pants, skirts, fine garments, cushions. Medium works on sizes 5-7 examples jackets, sleeping bags, tents, purses, duffel bags. Large works on sizes 8-10, examples wetsuits, boat covers, canvas tents, heavy duty clothing. PROBLEMS GETTING YOUR NEW ZIPPER STARTED? See the video "How To Get Your Zipper Started on Closed End Zippers". CHOOSE SIZE: (See Video) check back of broken zipper; most zippers have a size number (1-10) on back of slider. Sizing chart below will determine which FixnZip is right. If zipper doesn’t have number, measure width of zipper teeth in millimeters or inches. Size GUIDE: Small zipper slider: teeth and coil sizes 1-4, medium zipper slider: teeth and coil sizes 5-7, large zipper slider: teeth and coil sizes 8-10. Repair most zippers easily: apparel, backpacks, tents, boats, marine, sleeping bags, purses, jackets, pants, bags, luggage, wetsuits, and more. Works on open-end, closed-end, and invisible/ Watertight zippers. No tools or sewing required: Fix zip isn’t your average zipper repair kit. It’s a replacement zipper slider that you can install without tools or sewing. 3 Black Nickel zipper combo pack: includes 1 size small, 1 size medium and 1 size large.Brand: Fix n Zip. Material: Metallic-Fiber. Color: Black Nickel. Import: Made in the USA. Included Components: Small Medium & Large Replacement Zipper. Batteries required: No. Warranty Description: One Year Warranty, The product is guaranteed to be free from defect in parts and assembly. Number of pieces: 3. Assembly required: No. Mildew-resistant: Black Nickel. Is Discontinued By Manufacturer: No. Best Sellers Rank: #2,811 in Arts, Crafts & Sewing. Customer Reviews: 3.8 3.8 out of 5 stars 846 ratings 3.8 out of 5 stars. Item model number: SMLZSG110. : B00WZZB4Z8. Manufacturer: CTF Enterprises. Inc. Department: unisex-adult. Item Weight: 1.44 ounces. Product Dimensions: 2 x 3 x 2 inches.