Razer Orochi V2, you will not regret it I swear, small egg shape + 56g with no holes or if you are trying to spend a little bit more money the model o minus wireless is another good option as well
Delux m800 (wired) is a cheap, lightweight 58G mouse with a razer viper shape if you wanna go for off-brand stuff. Quality is ok but def not as good as Razer or Logitech.
gpro superlight is good but a more affordable option is the steelseries aerox 3. DO: make sure that u check all the different aerox colours cause for some reason the colour changes the price (the one i was looking at was $180 but a similar colour was only $110)