I've been making my own recently...I use the weed guard fabric and braided fishing line. Just choose the size you want cut it sow it and bam you got a bag that's size is fit for what ever you want to grow! I've been using 40lb braided line and I double over the weed guard material. It's pretty strong and should last at least a few years. I found it nice since I'm growing random stuff and don't have the funds to buy dirt and random sized bags. So I figured I would share this with you guys