1/32 of an inch is not very much - but say the block is made 12 strips that are cut at 1.5 inches.
If one loses (or gains) 1/32 on each side of the strip - that would be 1/16 of an inch on each strip - and there are 12 strips
12*1/16 = 12/16 = 3/4 of an inch.
The variance can be cumulative - If one was planning to alternate plain squares with the stripy units - it could be a bit of a problem.
(Although I did see "somewhere" - to make the units of the smaller pieces first - and then cut the bigger units "to fit")