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 フィンガースプリントトリオ 3パック (10、11、12)

Product ID: 769509783

Details

サイズ
10 11 12
ブランド
Brace On
ユニット数
1.0 個
商品の個数
3
商品の重量
1 オンス

📏3 precise sizes (10,11,12)

⚖️Ultra-lightweight 1oz

🛡️Durable & waterproof

HK$589

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖐️ Support your grip, not your style—heal smart, live free!

TAILORED FIT FOR EVERY FINGER - Comes in three sizes to ensure snug support without restricting movement.
VERSATILE HEALING FOR REAL LIFE - Ideal for arthritis, trigger finger, and minor injuries—stay productive while you recover.
DISCREET SUPPORT VISIBLE RESULTS - Sleek, low-profile look means you can heal without drawing attention.
ALL DAY COMFORT ALL DAY CONFIDENCE - Thin, breathable design lets you wear it day & night without bulk.
BUILT TO LAST THROUGH LIFES DEMANDS - Waterproof and durable materials keep your finger protected in any environment.

The EZ Finger Splint Trio by Brace On offers a lightweight, waterproof, and durable solution for finger injuries and conditions like arthritis and trigger finger. Available in three sizes (10, 11, 12), its thin design ensures comfortable, all-day wear without bulk, making it perfect for professionals who need discreet yet effective support during daily activities.

Specifications

ASIN	B07S6Z733T
UPC	726481279833
おすすめ度	4.2 5つ星のうち4.2 (609) var
サイズ	10,11,12
パッケージ内に含まれる商品の数	3
ブランド名	Brace On
メーカー名	Brace On
ユニット数	1.0 個
商品の重量	1 オンス
商品本体サイズ	12.7 x 7.6 x 2.5 cm

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