What do you get if you mix and old sweater, some cheap flat shoes, and lots of hot glue? Sweater boots, that's what!
Step 1: The supplies
To make your boots, you'll need a big bulky sweater with nice large sleeves, some cheap flat shoes, a hot glue gun, and some buttons, as well as a sewing machine and a needle and thread. I machine embroidered my boots as well, but it's not necessary, just awesome :)
Step 2: Fitting your boots
Snip off the sleeves where they meet the sweater, flip them inside out, and slide them up your leg, sweater cuff first. Slip on one of your flats, and then stretch the sleeve to form to your leg, while keeping the edges wrapped around the shoe. This will give it a nice boot shape, instead of a big slouchy triangle.
Pin the new stretched shape in place.
Step 3: Sewing your boot
Once you have the shape you want, snip off the excess outside of the pins (I found there was a lot of excess near the back of the foot and especially at the heel, don't feel bad about snipping off quite a bit there). Carefully slide the sweater off your leg without disturbing the pins, and sew a seam down the side to secure your new boot shape.
Step 4: Fitting your shoe
Take your flat shoe, and slip the inside of the sole into the bottom of the sweater (the open side without the cuff), Line the back seam up with the heel.
Step 5: Glue!
Take your hot glue gun and go to town! Run a line of glue just above the seam of the sole, and glue the edge of your sweater in place. I started at the back near the heel, making sure the seam was centered, and then worked my way around to the front.
Step 6: Flip them right side out
Turn your boots right side out. This can be a bit challenging, but those cheap flat shoes are pretty bendable, which helps quite a bit. Test the fit to see if you like em'.