do these work on the thumb?

It depends on how long your thumb is I have really short fat fingers and had to return these and make my own splint

how do I know what size to get, I see no guidance for this.

There is a pdf file link in the full product description. It asks you to print out a sizing band at default printer settings. However, using a new Brother printer, it printed out 1/16 of an inch too small, and I had to bump it up to 103% to make it match the 3½" marker on the printout.

Are these very rigid or semi-flexible? Could I type while wearing it?

They are Rigid n strong. I use one on my pinky n one on my thumb and I type all day on & off with these. I have RA and when my fingers are swollen n stuff, to bend them gives me extreme pain !! So I bought these splints to prevent my fingers from bending you can take them off, move them around. Also another note: I have bigger sizes, there’s one where it comes w/ 32 sizes on a big round keychain. When my fingers r swollen or if ur finger is Broke, you will go they several different sizes. So getting the 3 pack in ur size is perfectly fine, but you may need a few in the sizes before & after I hope this helps !! Good Luck !!

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EZ Finger Splint Trio 3 Pack (4,5,6)

Product ID: 430816076

Details

Brand
Brace On
Size
13 14 15
Specific Uses For Product
Turning Finger
Age Range (Description)
Adult
Net Quantity
1.00 Count

💧waterproof for all-day wear

⚙️adjustable fit with unique angle

🛡️24-hour durable protection

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€ 65.41

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Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖐️ Give your fingers the VIP treatment they deserve!

TAILORED TO YOU - Available in multiple sizes (4,5,6) ensuring a perfect fit for every finger from pinky to thumb.
INVISIBLE COMFORT - Ultra-lightweight, low-profile design that feels like a second skin, so you forget it’s even there.
FLIP FIT TECHNOLOGY - Switch between tight or relaxed fit instantly by simply changing finger entry—no straps needed.
BUILT TO LAST READY FOR LIFE - Waterproof and durable plastic construction means no need to remove during daily activities.
ALL DAY ARMOR FOR YOUR FINGERS - Enjoy 24/7 support without interruption—wear it while working, showering, or playing.

The EZ Finger Splint Trio by BraceOn offers a versatile, lightweight, and waterproof solution for finger injuries like mallet and trigger finger. Featuring a unique adjustable fit design, these splints provide 24-hour durable support without straps or tape, ensuring comfort and protection throughout your busy day. Available in multiple sizes, they cater perfectly to all fingers, promoting faster healing with a barely-there feel.

Specifications

ASIN	B07S25JPZP
Age Range (Description)	Adult
Age Range Description	Adult
Best Sellers Rank	#278,981 in Health & Personal Care ( See Top 100 in Health & Personal Care ) #382 in Finger Splints
Brand	Brace On
Brand Name	Brace On
Closure Type	Hook, Loop
Customer Reviews	4.1 out of 5 stars 3,221 Reviews
Item Dimensions	12.7 x 7.6 x 2.5 Centimeters
Item Weight	0.02 Kilograms
Manufacturer	Brace On
Material	Plastic
Material Type	Plastic
Model Number	AUB09MYC29S5
Net Quantity	1.00 Count
Number of Items	3
Part Number	AUB09MYC29S5
Product Care Instructions	Hand Wash Only
Size	3 Piece Assortment
Special Features	Lightweight
Specific Uses For Product	Mallet Finger
UPC	726481279802
Unit Count	1.00 Count

Reviews

C**R

11.04.2026

C**O

10.07.2024

P**N

9.12.2025

S**P

1.09.2023

M**S

14.09.2025

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€ 65.41

Duties & taxes included

In stock

Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to France.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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