fuse size

[jblum09]

Im looking to install an interior footwell kit. The website has an 'add-a-circuit' available. The add a circuit goes into the fuse box on the drivers size. I need to know what the fuse sizes are for in the car; 3/4" wide or 3/8 wide? "I looked in the manual but I cant find it. I drive a 2012 mazda 3 sport gs-sky.

Thanks