OK, this may seem kind of weird..but I dont use patterns or measure any of the fabric, so I cant really say how big or whatever to make the fabric I just cut and pray it works out hehe.
Anways, It was extremely easy to make.
step 1: Obviously cut the fabric.. Make one longer cut of fabric for the flap over, the bottom the back and the inside front.
(Basically the bag is all one peice of fabric plus sides)
Step 2: After sewing the fabric together..sew it into sections, what i did was count 7 or so lines and then sew and then 5 or so and then sew, this breaks it all up into the peices it will be without having to make each peice separate.
step 3: turn inside out and sew the sides to the bottom and the sides of the sides to the sides of the main peice. Before closing up the top of the sides, slide in the strap and then sew it.
step 4: turn right side out, and Hand sew the little heart, you can use a machine, but I just hand sewed it.
I guess thats it, im sorry its kind of half ass, but Ive never written out a tutorial before =)
good luck<3