When measuring the depth of my mattress (when ordering custom sheets), should I “add” to actual depth to allow for shrinkage, etc?
This is not really necessary as our manufacturer allows for this (depending on the fabric used) when they cut the sheets. If you still want to add to the depth, make it about no more than one inch. Note: If you have a foam, Tempur-pedic, or square cornered mattress, you need to add 1.5 to 2 inches to your measurement.