I love this sizer. I use painters tape or masking tape to shape the cone and then put mini bulldog clips of the top and bottom When I travel, I unclip and untape, open flat and put in the bottom of my suitcase or bead box. Have had mine for 5 years and use it often.
Either I did not read the description well or the information just wasn't there. I had not idea when it say travel version, it was a flat piece of cardboard. Once put together, it no longer can travel as it will be crushed but if I just use it at home, it works sufficiently for me to use it. I would have preferred a solid mandrel - much more accurate.
I put a floral cone inside to stiffen it up. It really works out good.
I am going to stuff this with styrafoam cone to make it more solid,otherwise this is a very handy tool.