Not sure which mouse shape or size is right for you? Start with your hand size and grip style, then narrow down your options based on palm support and overall shape. 

1. Measure Your Hand

Start with your hand length. Place your hand flat on a table and measure from the wrist crease to the tip of your middle finger.

Large hands: ≥ 19.5 cm
Medium hands: 17–19.5cm
Small hands: ≤ 17 cm
Hand length gives you a general starting point for choosing a mouse size. But it should not determine your choice on its own. Your grip style and preferred shape matter just as much.

Check Your Hand Width

Measure across the widest part of your palm, excluding the thumb.

· Wider hands may feel more comfortable with a wider shell.

· Narrower hands may prefer a slimmer mouse.

 Use hand length as your starting point and hand width to fine-tune the fit.

2. Find Your Grip Style

How you hold your mouse has a big impact on which shape will feel most comfortable.

Palm Grip

Most of your palm rests on the mouse, with your fingers lying relatively flat.
Contact Points: Fingertips + Most of the Palm
Look for:

· A fuller, longer shape
· More palm support
· A medium to high profile

 Best for: users who prefer a relaxed, supported grip with more contact between the hand and the mouse.

Claw Grip

The base or rear of your palm rests on the mouse while your fingers arch upward.
Contact Points: Fingertips + Base / Rear of the Palm
Look for:

· A medium or slightly shorter shape
· A rear or center hump
· Good support at the base of the palm

 Best for: users who want a balance of stability, control, and quick movement.

Fingertip Grip

Only your fingertips control the mouse, while your palm stays off the shell.
Contact Points: Fingertips Only
Look for:

· A shorter, more compact shape
· A lightweight design
· A low to medium profile
· Plenty of finger mobility

 Best for: users who prioritize agility, quick repositioning, and precise fingertip control.

3. Choose Your Preferred Palm Support

The hump is the highest point on the top of the mouse.
Where it sits changes how the mouse supports your hand.

Rear Hump

Provides more support toward the back of the palm.
Good for:

· Claw grip
· Relaxed claw grip
· A more locked-in feel

Center Hump

Provides more balanced support across the palm.
Good for:

· Palm grip
· Claw grip
· Users who want a versatile shape

 Not sure? A center hump is often a good place to start.

Front Hump

Provides more support toward the fingers and front of the palm.
Good for:

· Users who prefer a fuller front-hand feel
· Users who do not need strong rear-palm support

4. Choose Your Mouse Shape

Once you know your grip and preferred support, choose the overall shell style.

Symmetrical

The left and right sides have a similar overall shape.
Often works well for:

- Claw grip
- Fingertip grip
- Gaming
- Frequent lifting and repositioning

 A symmetrical mouse usually gives your fingers more freedom to move.
Keep in mind: symmetrical does not automatically mean ambidextrous. Some symmetrical mice still have side buttons designed mainly for right-handed users.

Asymmetrical

The shell is shaped around the natural contour of one hand.
Often works well for:

- Palm grip
- Relaxed claw grip
- Users who prefer more thumb and palm support
- Longer work sessions

If you want the mouse to feel more supportive and fill more of your hand, an asymmetrical shape may suit you better.

Vertical

A vertical mouse places the hand in a more upright position than a traditional mouse.
For example, the Keychron M5 Wireless Ergonomic Mouse uses a 47° vertical design.

Consider a vertical mouse if you prefer:

- A more upright hand position
- More palm support
- A different feel from a traditional mouse

Vertical mice can take time to get used to, and they are not automatically more comfortable for everyone.

5. Check the Dimensions

Once you know the shape you want, use the dimensions to fine-tune your choice.

Length: Shorter mice allow more finger movement, while longer mice usually provide more palm support.
Width: Narrower mice may feel easier to control, while wider mice may provide more hand support.
Height: Higher mice fill more of the palm, while lower mice usually feel less restrictive.

Remember: Two mice with similar dimensions can still feel very different because of their shape and hump position.

6. Find the Right Keychron Mouse

Use this as a quick starting point.