Rather than make the mesh and bra bags, I bought some online, since the prices were so good that I couldn't make them less expensive. The links are for a quantity of 6 bags each. Both bags usually run $4-5 each in stores. The quality is very good, too. Here are the links to what I bought:
Here is the link to the laundry bag tutorial (also note in the photos of mine that I took some liberties with measurements). Each laundry bag is fully reversible and I used 3 fabrics for each one.
Laundry Bag Tutorial