Detailed actual size, manual measurement of about 1cm error is considered normal:
100cm long 39 * wide 29 * high 98cm, feet cover an area of 24 * 22cm
80cm length 34.5 * width 26 * height 79cm, feet cover an area of 21 * 20cm
50cm length 21.5 * width 18 * height 49cm, feet cover an area of 14 * 12.5cm
35cm length 15 * width 12.5 * height 35cm, feet cover an area of 10 * 9cm
27cm length 12 * width 10 * height 27cm, feet cover an area of 7.7 * 7cm