Abstract: A hinged binder assembly for a plurality of stacked planar plates or cards 11 on which rug samples 10 are mounted. Each card is laterally inserted and held at one end in a generally rectangular rail member 12, 27 having circular passages 23, 24; 33, 34 in respective rear and front walls thereof. U-shaped stirrups 19, 29 are inserted into and hingedly connect the rail members together from both sides such that one arm of each stirrup extends into a rear wall passage of one rail member while its opposite arm extends into a front wall passage of the rail member lying immediately above in the binder "closed" position. The connecting webs 20, 30 of each stirrup thus extend at an inclined angle between adjacent rail members. With this arrangement the sample bearing cards can be turned over one at a time in the manner of book pages, or pulled out in a translational manner into a partially overlapping stepped configuration wherein portions of all samples are exposed for viewing.