Peel-away sheath sizes and insertion tips:

6.5 inch Damascus Folding Pocket Knife with Sheath Black-Red Wood & Brass https://amzn.to/4iE7RjE

Removing the Peel-Away Sheath – Part 1:

De quervain’s tenosynovitis exercises by Mr Physio: wrist thumb pain relief

Understanding Trigger Finger (Stenosing Tenosynovitis)

Understanding De Quervain’s Tenosynovitis (Mummy Thumb)