First, decide what dimensions you want your bag to be. I made a square bottom type tote, so the dimensions of your cut square/rectangle aren’t exactly the dimensions of your finished bag.
Start by cutting 2 rectangles from each of the fabrics you’ll be using (inner & outer of the bag). You should have 4 identical squares total. I started w/ 10x12” rectangles. I usually cut my handles now and fabric for pockets, if I’ll be using any.
For handles you can use self fabric which I just cut to size, sew the seam, turn and topstitch, -- or you could use ribbon or webbing stuff they sell for handles.
For pockets I cut 2 identical squares, sew up 3 seams right side together, turn, press raw edges under, and stitch that side closed (I usually use that side for the open side of the pocket so no sides have 2 rows of stitching).
So … now we have 4 rectangles cut for the body of the bag, and the handles and pockets (if any) cut and assembled.
Cut a square out of each bottom corner of each square (you can stack your rectangles and cut these all together, just make sure the prints are going the right way if they’re directional.) For this bag, I made 1.5” squares. The size of the squares determines the “depth” of the bag.
If you’re going to use pockets, sew them onto the rectangles now.
Now, right sides together sew up the sides and bottoms of each pair of rectangles.
