Can't make this a very detailed guide cause I didn't really take enough photos. Plus, this was a very rushed work for a cosplay appearance job recently so I would say it's not exactly my best work (don't wanna teach you crappy work hehe). I completed this whole bow from planning to finished product in 2 nights (collectively probably 7-8 hours). Only had time to do it after I get home from my day job.
So. First of all...
To make awesome props, you need a Propmaker Dog.
My very own Propmaker Dog, Mystie. Here you can see her tracing the pattern onto EVA foam.
*She the one who makes all my cosplay props!
Okay just kidding.
First you'll need to construct both sides of the bow.
I made both sides separately so that it is easier to pack for conventions/travelling. They are connected by a pipe connector in the center.
Paint them, shade them.. don't forget the details!
Assemble it and wrap brown PU leather around the handle.