Full customs can be made from my in stock fabrics or from wraps or fabric provided by the customer. Semi customs are carriers made from my in stock fabrics and wraps only. Semi customs sizing can be changed from the standard dimensions if needed. I may be able to add other extras depending on fabric available (but regular price for extras will apply). Turnaround time is 4-6 weeks for semi customs and usually 2-4 weeks for full customs. I sew ring slings around other sewing so turnaround time for those is usually 1-2 weeks. There is some more information about ring slings here.