I think that you will find using a stencil to be probably the easiest way to go about painting the circle. You can also attempt a stencil for the letter, but you may want to try out using a wall decal.
Shoshana Gosselin Hi kelseystreifthau! I actually used thread and a very thin sewing needle. I tied one end of a piece of thread to it. I tied the other end of the thread to a pencil. I pushed half the needle into the wall so it was secure, then pulling the thread tight, in a slow circular motion, marked it with the pencil. The letter was done free hand so it didn't look perfect. Thanks! Shosh
Shoshana Gosselin Hi Sweetyr! The blue is Sherwin Wm Flyway SW6794, and the green is Sherwin Wm Vegan SW6738. The color combination was a big hit with my client. Best of luck with your room.-Shosh
http://www.ikea.com/us/en/catalog/products/20116274