Stitch markers help us keep our place in the pattern - don't get lost! And also helps us with that pesky stitch counting! Various kinds (locking, circle, split ring) and sizes.
For crochet: the locking and split ring are recommended; ring markers don't work for crochet.
Locking markers are great for marking the right side of your project as well as along your needle/stitches. An advantage to locking markers is that you can move them without having to knit to the spot where they are.
Ring markers: great for when you need a LOT of markers. The lace markers are especially great for lacework since they are very small and there are lots of them!
Regular Soft Ring Markers below (#2575) in green and purple include 10 small for US-5 and 20 large for US 5-11. The Jumbo soft ring markers (#1669) that are blue and yellow include 10 small for US 11-15 and 16 large for US 17-35 needles. The Rainbow rings are an assortment with 7 of each of 4 different sizes and colors in a hard case. The Sock and Lace Rings (black, item 6156) are for 0-3 size needle. The Bryspun rings are made in the USA (Eugene, Oregon).
Bryson Pear Shaped Markers: 20 7/8 inch antique brass pear shaped markers.
Lacis Brass Ring Stitch Markers: Perfect for counting stitches for needles up to size #11. This package contains fifty 3/8 inch stitch markers. Imported.
Knitter's Pride Zooni Stitch Markers: Pack of 12 pink kitties! loop top with light pink kitty pendant; comes in zip up silver mesh bag