Unfunded Liabilities: a/k/a The Cloth Thread - Page 484
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The posts said 4 yards for a two piece, and 2 for pants, but it should be less than 6 yards for a two piece plus extra pants (I was asking how much less). It's less for the same reason that a two piece takes 4 yards, whereas an odd jacket plus odd pants takes 4.5 yards. You save cloth when the pattern is part of the same suit.
It's still better to ask the person who is making/cutting the clothes to be sure. Also better to have extra than not enough cloth.
For jouneyman he probably needs 5.5 yards. Could require less or maybe a bit more. He didn't specify if getting pleated trouser or other details.