Wait, was that decrease supposed to be a SSK? a K2tog? or a S1K1PSSO? Should this increase be a YO? a M1R? or a M1L? Let these stitch markers tell you what to do! Place these markers at crucial points in your knitting and you'll have a handy reminder. Each set of markers comes with six different stitch markers, available on rings or on removable bulb-shaped safety pins. * YO * SSK * S1K1 PSSO * K2TOG * M1R * M1L Product Details: * Material: Birch with stainless steel rings or metal removable pins * Approximate Size: 3/4” x 3/4” x 1/8” * Rings - stainless steel rings with a 9.5mm inner diameter.