DIY detachable collars. Need a pretty collar to wear with your favorite sweater? With these DIY detachable collars, you can create a Peter Pan collar or a classic shirt collar in a variety of patterns. The large Peter Pan collar can be sewn simply or surrounded by a lovely little ruffle. These detachable collars consist of a front and back bib connected by an elastic band under the arms. Instructions and full-size pattern in French from size 34 to 46. To cut your fabric with ease, a cutting plan is provided based on the width of the fabric used. Pattern in a new exclusive reusable cardboard box by La Droguerie! The paper pattern comes with an explanatory sheet to help you create the model. Pattern designed, manufactured, printed, and hand-folded in France.