2
Even assuming that iches is a different way of spelling inches, the question cannot be answered since you have not specified 90 WHAT! 90 millimetres, 90 light years or something between the two?
36
my butt iches
11.22 inches
76.2 cm
22.86 cm
1 yard = 36 iches. That's bigger than 28 iches.
0.787 inches
There are 108 inches in 3 yards
4 inches = 10.16 cm
104 meters is 4,094.5 inches.
5,280 feet X 12 = 63,360 inches