Why don't you be a little bigger when you take a portrait? How big is it? Is the large reflector easy to carry? Do you still need a reflector frame?

Of course, it is better to be bigger, because a big mirror can illuminate a small object, and a small mirror, in turn, can do nothing about the big subject, so the main problem is really carrying.

You can fold a large reflector with foam board, or you can buy your own materials to make your own size.

There are ready-made multi-surface/single-surface reflectors in the market, which are framed by soft metal, which are very easy to store and have a large volume. They are very portable after storage. You can buy this.