We only have a handful of practices and scrimmage time is pretty short, so if I'm gonna have scrimmage vests they need to be practically free, not $5-6 dollars each!!!
I usually have 13-14 girls on a team and the most I've ever had at a practice is 13, so I figure 6 scrimmage vests should cover it. I bought 3 mesh laundry bags at Dollar Tree. Cut them in half and cut arm and neck holes. I sewed anywhere that that came unraveled from cutting and voila, 6 scrimmage vests. 3 even have fancy drawstring hems. This takes almost no time at all. Love it.
Note these are crop top length, super cheap, but a bit small.
For a more comfortable vest, you could buy six laundry bags, cut off the top third to make the vests t-shirt length, then you sew the top closed. Finish by cutting neck and arm holes.
Update: I have now used these super cheap vests two seasons. The girls have stretched and pulled and mishapen them, they are pretty ragged now, but they get the job done and I still like how cheap they are!
You do have to sew a seam on the second vest and a few other places to avoid fraying, sorry about the sewing:( (you could probably glue it instead with good fabric glue)
neck 9 inches (perhaps a smaller neck for younger kids than 5th/6th grade)
arms 8 inches
no hemming, just fast and easy, lets go play!