This is my Baby Simple Big Stripe Onesie knitting pattern. This fantastic onesie is stunning. Its worked flat on 2 straight 4 mm needles in any dk (8ply) thickness yarn of your choice. The knitting pattern provides full written instructions for 5 sizes XS( 0-3 months), S (3-6 months), M (6-9 months), L (9-12 months) and XL (12-18 months) and there are lots of step by step photos to help you along the way.