Instructions (English) on how to make this Romper. Sizes: 0-3 months, 3-6 months, 6-9 months, 9-12 months, 12-18 months, 18-24 months. Experience level needed: Advanced Beginner. Yarn and needles used: Worked with DK weight yarn, 3,5mm (4US), and 3mm (2US) straight needles. Worked Flat. This is a digital file, not the actual finished item. You cannot resell this pattern but you can sell the finished item! ©Berta Knit Store All Rights Reserved. Baby Romper Knitting Pattern. Knitting Patterns Baby Work Flats, Dk Weight Yarn, Baby Bee, Pdf Knitting Pattern, Baby Romper, Yarn Needle, Baby Knitting Patterns, Baby Patterns, Knitting Projects