4.84 from 145 reviews · Patented design

Stop drilling holes
in your bass.

Thumb Fin is a suction-cup thumb rest you can place anywhere, move anytime, and remove without a trace. No screws, no adhesive, no regrets.

Shop Thumb Fin — $20Watch it in action
Zero-damage suction mountRepositionable anytime6 colors one fitPatented since day one

Three steps, no tools

Most thumb rests mean drilling into your instrument. Thumb Fin doesn't.

01

Clean the surface

Wipe the spot and the suction cup with a soft cloth. Matte finish? Apply the contact paper first.

02

Press it on

Place it where your thumb naturally rests and press firmly. Move it anytime: no screws, no adhesive.

03

Play, relaxed

Your thumb rests in a relaxed, natural position, so you can focus on your playing, not your hand.

Pick your Thumb Fin

Three shapes, six colors. Every one mounts by suction, no tools.

Original

$20

The first Thumb Fin shape, and our tallest profile.

Color: Black
Learn more about Original

Low Profile

$20

Sits 4mm lower than the Original, keeping your thumb closer to the body of your instrument.

Color: Yellow
Learn more about Low Profile

Contoured Low Profile

$20

The same 4mm-lower height as the Low Profile, with more concave sides that cradle your thumb.

Color: Black
Learn more about Contoured Low Profile
Save $10

Thumb Fin Combo 3 Pack – One of Each Version

One of each version, so you can find your favorite before committing to one.

$50

vs $60 buying 3 separately

Learn more about Thumb Fin Combo 3 Pack – One of Each Version

+ Thumb Fin Contact Paper for Matte Finishes

For satin or matte-finish basses — gives the suction cup a surface to grip. Often added with any color.

$2
Learn more about Thumb Fin Contact Paper for Matte Finishes

What bassists are saying

4.84 ★ (146)
Verified

See who's been loving Thumb Fin on Instagram

Play video: See it mounted on a real bass

See it mounted on a real bass

Watch the two-minute demo — attaching, repositioning, and a full playing session with Thumb Fin.

Watch demo

Bass thumb rest FAQ

Will Thumb Fin damage my bass?

No. Thumb Fin mounts with a suction cup, so there's no drilling, no screws and no adhesive. It comes off without leaving a mark, and you can move it to another instrument anytime.

Does it work on matte or satin finishes?

The suction cup needs a smooth, non-porous surface. On gloss finishes and pickguards it sticks directly. For matte or satin finishes, apply our contact paper first to give it a surface to grip.

Where should I put my thumb rest?

Wherever your thumb naturally rests while you play. Many players mount it on the pickguard. Because it's suction-mounted, you can try a spot, play for a while, and move it until it feels right.

Which version should I choose?

The Original is the first Thumb Fin shape and our tallest profile. The Low Profile sits 4mm lower. The Contoured Low Profile is also 4mm lower, with more concave sides. Not sure? The Combo 3 Pack includes one of each.

Does it work on guitar too?

Yes. Thumb Fin works on bass, guitar, ukulele and more. Anywhere with a smooth surface where your thumb wants to rest.

How do I keep it holding well?

Wipe the spot and the suction cup clean, then press it on firmly. If it ever starts to lose grip, clean both surfaces again and re-press it.

Featured products

About Thumb Fin

  • OUR TEAM

    Thumb Fin was designed as a way to add a thumb rest to a bass or guitar without altering the instrument. Its ergonomic shape gives your thumb a relaxed, natural place to rest, so you can focus on your technique. The best bass thumb rest you'll ever use.

  • OUR MISSION

    Interested in trying a thumb rest but don't want to alter your instrument? We've got you covered. Thumb Fin lets you place your thumb rest where you want, when you want, and move it whenever you like. It mounts by suction, so it works across basses and guitars instead of fitting only one model.

  • PATENTED

    Patented as the first suction-cup thumb rest, Thumb Fin was engineered to let you choose exactly where your thumb sits. Its ergonomic design gives your thumb a comfortable, natural resting point, so you can focus on your technique.

Blog posts

  • No Treble: Bass Gear Roundup: The Top Gear Stories in February 2024

    No Treble: Bass Gear Roundup: The Top Gear Stor...

    Shout out to No Treble for having us on the top gear list!   https://www.notreble.com/buzz/2024/03/01/bass-gear-roundup-the-top-gear-stories-in-february-2024/

    No Treble: Bass Gear Roundup: The Top Gear Stor...

    Shout out to No Treble for having us on the top gear list!   https://www.notreble.com/buzz/2024/03/01/bass-gear-roundup-the-top-gear-stories-in-february-2024/

  • Two new sizes coming soon!

    Two new sizes coming soon!

    While the original Thumb Fin thumb rest is amazing and ergonomically designed, some users may want a lower profile. We are still working out the optimal geometries, and they will...

    Two new sizes coming soon!

    While the original Thumb Fin thumb rest is amazing and ergonomically designed, some users may want a lower profile. We are still working out the optimal geometries, and they will...

  • Have a matte finish? Now you can use Thumb Fin too!

    Have a matte finish? Now you can use Thumb Fin ...

    We now have a solution for using Thumb Fin on matte finishes. By applying a small piece of contact paper, you now have a surface which the Thumb Fin can...

    Have a matte finish? Now you can use Thumb Fin ...

    We now have a solution for using Thumb Fin on matte finishes. By applying a small piece of contact paper, you now have a surface which the Thumb Fin can...

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