
Logitech G
G600 MMO Gaming Mouse
Customizable MMO workhorse, durable, but discontinued and pricey.

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I just bought pulsar xlite v4 my first wireless mouse. Im so impressed and its so easy to use, easy to slide, gaming performance increased. I had zowie ec1. I play only dota 2.
If you really insist, you may want to check out [**Pulsar Xlite V4 Ultralight Weight eSports Mouse Size 2**](https://ecommerce.datablitz.com.ph/collections/all/products/pulsar-xlite-v4-ultralight-weight-esports-mouse-size-2-white-pxl422). I got the Xlite V3 Size 1 about 2 years ago and mine's still perfectly working. If you want to gift a peripheral, make it worth it. Do not buy something that won't last long term.
It will depend a lot on how you hold the mouse and how big your hand is. My hands are 11cm x 20cm and I think the xlite medium size is more comfortable to palm grip than the mini. For claw grip the mini is more comfortable than the medium for me. If you want mouse for just work I would go with a vertical mouse.
I have a very similar hand size to yours, and I have tried many mice in the past few weeks. I usually play with a relaxed claw grip. If any shop where you live offers a return policy or allows you to try mice in their shop, I would suggest that. Your palm should have decent support, and all of your fingers should be able to rest naturally. I didn't like the Viper V3 Pro because it was too narrow in the middle, and the clicks caused my fingers to go into a V shape. My pinky had no place to rest. The Maya X and Superlight 2 are much more comfortable and universal for symmetrical mice. For ergos, I might recommend the EC2 or Xlite V4 medium, which are very popular shapes. I believe that mice under 122x62x40 will feel weird if you sometimes palm your mice and are used to good palm support. Smaller mice would work, but you need a different grip style with your hand size.
Looking at your foto it’s probably a palm grip, so I’d recommend either a very safe ambi shape like gpx 2 (many cheaper clones available) or maya x or an ergo like Deathadder v3/v4 pro (hyperspeed if you want smaller), Xlite v4 (es) medium, ec2-dw, e1 or superlight 2 dex
Vertical mice help the best for the pain I believe. Razer seem to have released Click V2 vertical so that's an gaming oriented option. Another option is to use very light asymmetrical "ergo" mouse. Most obvious recommendation is deathadder v3 pro or v4. For vertical mouse you don't need to consider weight. I've also suffered pain in the same areas and still do a little. I did do strecthes which increased the pain at first but alleviated it eventually long term and started using lighter mouse with lighter scroll wheel button (I suspect very stiff middle mouse button added pain). I also recommend a healthy dpi range (800-1600). Too little or too much and you are going to use too much of your wrist or shoulder. Right now I use deathadder v3 pro or Pulsar v4 medium. Good luck! Edit: oh yeah don't forget a good shape.

Logitech G
G600 MMO Gaming Mouse
Customizable MMO workhorse, durable, but discontinued and pricey.

VXE
R1 Series
Budget king: lightweight, great value, long battery life.

Hitscan
Hyperlight
Ultra-light (39g) for small hands; sensor is outdated.

Razer
Viper V3 Pro
Adaptable shape, optical clicks, but scroll wheel malfunctions.

Logitech G
G502 HERO High Performance Gaming Mouse
Durable, heavy workhorse with free-spin scroll; prone to double-clicking.

Ranked #1
Hitscan - Hyperlight

Ranked #1
Teevolution - Terra

Ranked #1
Razer - Viper Ultimate

Ranked #1
ROCCAT (Turtle Beach) - Kone Pro

Ranked #1
Logitech G - G600 MMO Gaming Mouse

Ranked #1
Razer - Naga Trinity