To keep things flexible (and cheap, which you will notice is a common thread for my shop fixtures) I bought clear shower curtains and spring-loaded rods at a local Ross Dress-For-Less, home of massively discounted housewares. I have a set of bicycle hooks screwed into the ceiling so I can just pop the rods onto the hooks if I want them, or hang them on a set of hooks outside if I need to get them out of the shop. When I'm roughing bowls I absolutely use the curtains or else my entire shop gets mulched. One curtain is directly behind me, covering the shelf where my chucks and some of my roughed-out bowls live. There's about 3-1/2 feet of working space there. Another curtain is mounted about 18" from the far side of my lathe, leaving me plenty of room to swing long tools or move my dust collection around. The other 2 curtains are on the right as I stand at the lathe, and they slightly overlap the first 2 and angle to meet each other, closing off my work area. I tape a washer to one curtain and a rare earth magnet to another to make snaps that hold the edges of the curtains together at that angled end, since that's where I step out to get to my grinder.
My curtains are mounted close to the ceiling, since the bulk of my debris flies upward. They stop about 16" from the floor and that's fine. I'm not operating a surgical theater here, just trying to contain the bulk of the mess. Even if I've been roughing for hours, the curtains stop almost all the shavings, leaving them piled in a heap ready to be shoveled up.