The ClearSonic IPF - IsoPac F is a medium sized vocal booth with a lid that is also great for isolating and recording guitars, brass, woodwinds, and other acoustic instruments. If reflections off the front shields during a recording are a problem, purchase a few S2224 SORBER baffles that can be Velcroed to the offending shields and attach them at the same height as the mic for best results.
The ClearSonic IsoPac F is 5-feet wide x 5-feet deep x 6.5-feet tall.