The Profoto OCF 2×3 foot rectangle softbox is still a nice manageable medium size. It will give you a soft even light over a ¾ to full length portrait.
OCF Softboxes are tailor-made for fast and easy on-location or studio use. Like other softboxes, OCF softboxes create a soft and flattering light, but unlike other softboxes, they are made in a unique material that is both lightweight and easy to fold and unfold. In addition, the fixed diffuser and the color-coded rods make it one of the fastest and easiest softboxes on the market to set up.
There are four OCF Softboxes to choose from, each with a unique size and shape: strip, square, rectangular and octagonal. All four can be equipped with a Softgrid for even more precise light shaping.