Let's get started.
Step 1: Materials
13 inch Apple Macbook Air
rotary blade and/or scissors
cutting board (self-healing ones are best for this)
top stitch or heavy duty sewing machine needle
top stitch or heavy duty thread in any color
sewing machine (but you can hand stitch instead)
grommets package and application tool. (I used 1/2 inch, bronze)
Step 2: Measuring
After measuring, I took my leather piece and played around with how I wanted the final product to look. This is where I discovered how amazing the end grain of my leather is and decided to leave it raw (untouched, unsewn) and to expose that end as the top flap.
Step 3: Cutting
I cut two straight edges with my rotary blade and makeshift ruler using the width of my device and adding on a 3/4 inch margin to each side.
For the length, I doubled over the fabric, so half of it sat underneath my device, and the other half on top. Then I decided how long I wanted the front flap to be, and added that length to the piece sitting underneath. Picture 3 of this step better describes this process. The length of leather sitting on top of the laptop will be the front flap, but it is a continued piece of the back portion. simple, eh?
Please be sure of your measurements BEFORE you cut! Leather ain't cheap!