If you're using a household wall socket, no motor over 15 amps should used and even 15 amps is pushing it. If you can use a 240 volt single phase outlet, then a 10 amp motor at 240 volts will work well.
Motor horsepower ratings get generous these days, particularly with Asian import motors. I've seen 13 amp motors "listed" as 1-1/2 HP motors, so be careful. 13 amp motors used to be rated at 1 HP. Naturally, motor speed will have to be 1750 rpm.
For sure, a big wide blade takes more HP to get it turning than a 1/4" wide blade.