Learn to Crochet - Crochet Diagrams
Diagrams are read exactly as the crochet is worked. Each stitch is represented by a symbol that has been drawn to resemble its crocheted equivalent. The position of the symbol shows where the stitch should be placed and worked.
Stitch symbols are drawn and laid out as realistically as possible, but there are times when they have to be distorted for the sake of clarity. For example, stitches may look extra long to show clearly where they are to be placed, but you should not try to match the chart by making elongated stitches. Crochet each stitch as you normally would.