How to know if a mouse is gonna fit your hands and thumb can reach the mouse buttons

[YoVSif]

Ok i gtg in 10 minutes so somone please try their best to answer my question b4 i go to work ok i was looking at this mouse http://pcpartpicker.com/part/redragon-mouse-m801 but the buttons look to far and my thumb looks small so how am i suppose to know the exact dimensions for this mouse so i can buy it and might fit my thumb for the buttons thanks in advance all!

 

[maestro0428]

Best way to buy a mouse is in person, so you can feel it in your hand. Then again, I usually just buy mice blindly and hope for the best. Its cheap, so I say just go for it.