The description of pocket chess is correct, as it fits nicely in a jacket . However the construction is probably best described of pressed card, with the pieces easily falling out of the holes – a neat little collectable and nice to have since I have a spare case as this was purchased from the likable eBay seller Sooty, the board playing area being about 4.5 x 4.5 inches oops not cms error corrected.
Why are there so few out there? Well, with the practical DE LA RUE combined pocket chess slotted board and card pieces, one might assume that due to the stiffness of the board, plus the number of lost pieces over time , that users preferred the leather wallet sets of celluloid men? Still a nice little thing to have, and a classic example of why chess collectors are best knowing each other as even in competition on occasion , friendships can be rewarded and strengthened.