Some of the basics about which of these you should choose, watch the full reviews for the in depth details! As always, the size guidelines are meant to be a general indication, not exact measurements. Everyone is different.
This is a re-upload, had to fix the audio.
Here are the review links:
SteelSeries Rival 700 https://youtu.be/dKNEbjAxCDA
SteelSeries Rival 300 https://youtu.be/1cyr4b9uK6o
If you’re from Australia, you can get these from MWAVE: http://www.mwave.com.au
Mouse Recommendations Direct Link: http://www.rocketjumpninja.com/find-a-mouse/
My Books: http://www.theheroesfall.com
My Music: https://soundcloud.com/zyism
Song used in this video: https://soundcloud.com/zyism/walking-away-demo