Bien Underbust Corset Crochet is ideal for emphasizing the bust to make you appear more attractive. This pattern is in US terminologies and is made to measure. You can use any size of yarn. For best results, use 100% cotton. Difficulty: Advanced beginners Materials: Yarn (Approx. 300g) with recommended hook size Tape measure Blunt Tapestry Needle Scissors Stitch Markers 1/8 size Ribbon (Optional) Note: This is not a physical item, but a PDF pattern. If you purchased the pattern twice, the seller will not refund your money.