Here is a tutorial on how to cut your own jelly roll strips!  Although it is very convenient to buy fabric that is already cut into strips for you, when it comes to solids colored fabric, I actually buy it by the yardage and cut my own strips to save money!  I would rather splurge my money on the designer fabric pre-cuts.

Start by starching your fabric and press flat.  Line up your selvage to make sure it is straight.

How to Cut Jelly Roll Strips (1 of 9)I like to fold over twice and line the ends up next to each other, as opposed to right on top of each other.
How to Cut Jelly Roll Strips (2 of 9)Use your cutting mat to make sure all sides are straight.  Make sure the sides are flush with the grid lines.
How to Cut Jelly Roll Strips (4 of 9)Use your ruler and rotary cutter to cut off the top of your fabric to make sure that is straight.
How to Cut Jelly Roll Strips (5 of 9) Use your ruler to measure out 2.5″ and make your first cut!How to Cut Jelly Roll Strips (6 of 9) Move your ruler over another 2.5″ and make your second cut.How to Cut Jelly Roll Strips (7 of 9) Continue until you’ve have cut as many strips as you can with your fabric.How to Cut Jelly Roll Strips (8 of 9) Stack them up and they are ready for use!How to Cut Jelly Roll Strips (9 of 9)