R.A.T. 6+

Fellow massive hand here, I use a Rat6+ as you can adjust the length and weight to fit your hand!

No one will suggest Corsair because the QC is bad and it's a brand people have decided to be elitist against (partly because most of the mice are heavy), but Corsair M65 maybe. There's also the Mad Catz R.A.T. 6+, but no optical switches. If looking for flat sides and maybe not short length, there are also the Corsair Glaive and Ironwolf, but again no optical switches. And the ROG Gladius II, which is hotswap (easily replaceable switches for when they break), but you already dismissed that option earlier. If you are strong, maybe the weight will bother you less.

An Ironclaw is probably your best bet, but the finish tends to wear excessively fast and some issues with scroll wheels have been reported. I'm in a similar boat. I have a g502 Lightspeed, and while I am fine with the thumb button placements, I find my pinky and ring finger feel too cramped. The only mice I've ever used that felt spacious enough were the R.A.T. series. The R.A.T. 3 was the first (and best) of the series I owned. Bought it well over 20 years ago. My brother uses it on his rig this very day. I eventually got a R.A.T. 9, but the sensor was awful, frequent disconnects, etc. A few years later they were bought up and the new series released (even numbers instead of odd). I got a R.A.T 6 and a R.A.T. 8. They were both awful and suffered from the side buttons failing after 3-6 months. Ergonomically, they were great, but their QC sucked ass and killed the company. There are also vertical mice, or perhaps an Elecom trackball mouse. Those are fucking huge. Elecom is sort of iffy. Really everything is.

If you like comfort and pinkie / thumb rests, RAT 6+ , 8+ something like that would be a big improvement for big handed people like u (adjustable and swappable parts = big improvement) , hit me up in DMs, maybe I can find u a coupon or something to welcome you to the Mad Catz FAM!

There are cheaper items: RAT 6+ or 8+

If you want something that's actually able to be adjusted to your hand, check out the MAD CATZ 8+ or 6+ if you want one slightly less $

beyond a doubt, RAT series from Mad Catz, only things that actually adjust to you . Everything else is fake ergonomics.

I use madcatz rat 6.0 :d

Been using a rat as my daily driver on my personal computer since the first RAT 5 ever released in late 2010, sensor died in 2018, replaced it with a RAT 6+ that got lost during a house move, currently have a RAT8+ and it's literally the perfect mice for me, biggest fear is to not be able to find another when if it dies in years. Life must not be easy on this sub as the trend is flimsy 7 grams shitty cardboard mice but please keep going and making sturdy products that have weights

Surprised no one suggested the Logitec G502. But I am glad no one has, because while it is short, it is very tall and it gives my (17cm) hands cramps. The only MMO mouse I can recommend to people with small hands is the MadCatz MMO7. It has adjustable parts. You can adjust the width, height and length of the mouse, as well as the weight. It doesn't look comfortable to hold, but it is very clever with its design. It supports you in every place that needs it, and the buttons aren't just a numpad, but are instead spread out across the mouse so there is no chance of accidentally misclicking. Build quality isn't amazing though and the price is quite high, so if you can handle only a little fewer buttons, I recommend the MadCatz Rat6, which has very good build quality. It has left and right mouse button and a mousehweel like all mice. But it also has a sideways mousewheel, and 5 extra customizable buttons.

Oh! I have this problem. My hands are small and every mouse is too big. Especially the one that is always recommended by everyone. The Logitech G502. Gives me cramps. People call it small and sure, it is short, but it is so tall! I recommend an infamous brand... the MadCatz Rat series. They are adjustable, both in height, length, weight and sometimes width. It is the only mice that doesn't feel too big for me. The build quality isn't that great, but the R.A.T. 6+ or 8+ are good. Avoid the others. And don't let the appearance scare you. It supports your hand in all the right places.