Mrs H - the blog: How to make an adjustable purse strap with two clip ends
How to sew bag straps and adjustable bag straps - YouTube
Amazon.com: WADORN Wide Purse Shoulder Strap Replacement, 31.5 Inch PU Leather Handbag Strap Clutch Bag Handles Shoulder Bag Strap with Alloy Buckles for Wallet Satchel DIY Bag Tote Bag Making, Black :