Usable up to 5mm needles. This is for counting rows in flat knitting. Use it by counting the front and back (odd and even rows) separately. Advance two at a time. The heart beads make the count easier to understand. You can also use just one for "front side only count". Also, I think you can use it for counting 10 rows in the round. R = right side (front) W = wrong side (back) This is a simple design with number beads strung on a cord. It's light and compact, and won't get in the way of your knitting. I recommend it for those who don't like the jingle of metal. The beads may have uneven paint or paint on the sides. Please refrain from purchasing if you are looking for perfect ones. If you don't need two, I will sell one for 680 yen. Please comment if interested. * Additional ones are 400 yen each. * Also available for 6-row patterns (1.2.3.4.5.6) and flat knitting odd row counts (1.3.5.7.9). * Other counts such as even row counts and 8-row patterns are also available. ★ Other colors are also available. ★★ The third image shows optional stitch markers. They are 60 yen each. Please comment if you would like to add them. Shipping will be via Yu-packet Post mini. (It seems to take 2-5 days including the shipping date for arrival.) ***Items that can be shipped together will be discounted by 100 yen from the second item. Please comment before purchasing.*** Stitch markers Row markers Stitch rings