I finished my muslin for Grainline's Scout Tee this weekend. I am very happy with the way it turned out. I used Grainline's tutorial for flat bias necklines and it worked out perfectly. I am just so happy with the way that the neckline and shoulders fit. I think that this pattern will be great for my looser fitting easy shirts like the green one below. I decided to use another pattern for my lace shirt. I want it to be a little bit more fitted and to have a bust dart. Any suggestions?

I often use old thrift store sheets as my muslin fabric. I find that it is the cheapest way to get a large amount of fabric.

I am curious, what do you guys use for your muslins?