Try this shirt thumbhole design from Threads Digital Ambassador Becky Fulgoni. It is sturdier than in-seam versions and better placed to accommodate each thumb.
Sew Sturdier, Better-Placed Thumbholes Into Sleeves - Threads
Occupational Therapy Sweatshirt Jackets for Male or Female, COTA, OT, OTR, Personalized Custom Office Unit or Team Shirts
Customizing With Oliver + S: Thumbhole Sleeve Tutorial, Blog
How to sew thumbhole cuffs tutorial
Buy Gift for Physical Therapist, Personalized PT DPT Shirt, Caduceus, Credentials, Embroidered Pullover Sweatshirt Jacket, Graduation Gift Online in India
how to sew HANDCRAFTED HISTORY
Thumbhole Cuffs Free Sewing Pattern and Tutorial.
How to Sew Up Holes: Easy Fixes and Repairs
Sew Sturdier, Better-Placed Thumbholes Into Sleeves - Threads
Sewing for Women – SewSophieLynn
Sew Sturdier, Better-Placed Thumbholes Into Sleeves - Threads
Ready for summer hikes with newly designed windbreaker jacket : r/sewing
Thumbhole Cuffs: A Tutorial - Hey June Handmade
Couture Tool Kit - Threads
G4Free Long Sleeve Workout Shirts Women Loose Fit Athleisure Tops Boxy Cropped Gym Tee Boat Neck Running Croptop(White, XS) : Clothing, Shoes & Jewelry