Here's How:
First trace an egg onto paper for your pattern. I just make this pattern up, nothing fancy.
Here is how we stuffed them.
She wanted a replacement for this old bag of hers, but with more pockets and a longer handle. I used the shape of the bag to make my basic pattern.

Here's how you do it:
Supplies:
I began by making my pattern. Of course it had to meet the size of the bag I was matching, but you can really make this any size. Mine was 13 1/2 by 14. However, I would make it longer if I were to do this again. This size fits a binder pretty good. Then you are going to cut your pattern out on the fold with your outer fabric piece, liner, and interfacing.
The contrasting fabric can be any size, but as you can see mine was cut 5 inches on the fold, or 10 inches by 14 inches.
Here is my cut pieces.
First you need to press the interfacing to the back side of the lining piece.
Press the edges on the contrasting fabric 1/4 inch.
Open up the folded piece of the outer bag material and pin the contrasting fabric to the bottom, matching centers.
Sew it on. Though I didn't mention before, I did sew on a pocket for my mama's keys, glasses, or whatever else she wants to put in there.
Then you will put right sides together and sew 1/4 inch. Press the seams. If you don't have a pressing tool like I have above, you need one. Great for sleeves and many other things.
Next is squaring off your corners. Not sure of the best way to explain this but I hope the pictures helps. Form a triangle at the corner edge, and mark with chalk roller or whatever you have. I marked about an inch from the tip, the farther you mark, the wider your bag will be. Do this for both sides.
Now sew on that line. Clip excess fabric and press.
Here's what your corners will look like.
I wanted the bag squared off good, so I sewed from corner to corner, like shewn above. Do this on the wrong sides.
Now you need to make your handles, any length you choose. Mine were 22 inches long and 2 inches wide, I believe. Cut with a lining and an outer fabric. Interfacing is also pressed onto the cotton fabric to give the handles more stability.
Sew them together, leaving both ends open. Though I think I did close an end above, that isn't necessary. Turn them right side out (I love my fabric tube turner) and press.
Though there isn't any pictures for this next step (oops) you need to press the tops of the liner and outer fabric 1/4 inch to the wrong sides.
Pin the handles in place, where you want them.
Carefully sew along the top. Press.
And you are finished.
My mama loves her new bag, at least that is what she tells me!