A note for modellers in the UK - 87 times normal size refers to HO scale, as in the USA, Europe, etc. In Britain, for simulating OO, P4, S4 or any other of the 4mm scales, the factor should be 76 times normal size (4X76 = 304 which is near enough to the number of millimetres in a foot). My furniture for the model railway room - table, chair, pictures, cupboards, bookcases, coffee mugs - is made to this factor, although to be fair 1:87 models often look right. After all, track by Peco is labelled OO/HO - or at least used to be when I used it. For strict 2mm scale I would use 152 times normal size, although commercial N scale here is I believe 2.0625 mm to the foot (historical reasons). For anyone wishing to simulate O scale, there is also a difference between UK and USA practice.
Ray