The smart sizing feature enables crafters who get your pattern to select to view their size only, instead of seeing all sizes. To enable it please first add all available sizes in your pattern's sizes section using one of these approved writing styles: Size1 (Size2, Size3, Size4) or Size1 (Size2) Size3 (Size4) or Size1 (Size2, Size3)(Size4, Size5). For example: XS/S (M, L/XL, XXL) or Baby (Toddler) Child (Adult). There is no limit to the number of sizes you can add. You can also use the sizes tab next to each instructional line to indicate which size(s) it applies to. As long as you follow the sizes formats above, Ribbuild will automatically highlights all available sizes and let crafters select to view their size only, instead of seeing all sizes.