I’m trying to knit a No Smoking sign for my house. I was going to buy one but I figured, I’d rather one homemade. I actually have the cigarette all charted out, that was easy…the funny thing is I Can’t figure out how to chart a circle outline. (Silly, right?) I’ve tried every way I can think of. I’ve tried using a image to graph program but that gave me a circle that was 3 lines thick. I only need 1…or 2 at the most. 42 stitches long (and tall…lol.) I’ve tried filling in block by block but it always comes out looking like a blob or an oval. I’ve even tried searching different charts that May have a circle. I can change the number a little but only bigger and I don’t want to make it too big. Thanks in advance for any help. 
Circle chart
Go to thisLINK and see if any of the charts on this page are helpful. There are several with circles. One I noticed that seems to have close to the number you need is one in black, red and white with a big “F” on it. The inside of that circle is about what you need. If none of them work maybe they will help you figure out how to make a nice circle. A circle will always be kind of jagged looking but from a distance will look pretty good.
The link wouldn’t take you right to the page, so you have to navigate a little. On the first page it brings up, look on the right for a link called “Knitting Patterns”. When it brings up that page, look on the left for “Soccer Logos”. When it brings that page up, when I clicked on any one of the logos it brought up charts for all of them. Lots of circles. Hopefully something will help.