Cover size for casewrap hardbound seems to have changed
In the past--at least 2-3 years ago--the cover size for a casewrap hardbound book seemed to require an extra quarter-inch on each side, in addition to the usual eighth-inch trim allowance (so the front cover and back cover, ignoring spine, for a 6x9" book would each be 6.38 x 9.75 inches)
Now, the requirement appears to be an extra three-quarters inch top and bottom, in addition to the usual eighth-inch trim margin: the front cover and back cover for a 6x9" book would each be 6.875 x 10.75 inches.
When did this change happen, and am I understanding it correctly? (Specifically, if my wife wants to replace the front and back cover, each with full-cover uploads, does she need to generate an extra 150 pixels of background color at the three outer edges--top, bottom, and non-spine edge? This time, it would actually be an 8.5x11" book, for which the pages are apparently printed slightly smaller, and I'm seeing 9.125x12.5 as the front and back size requirements.
[Actually, I can't quite make sense of the 9.125x12.5 requirement at all: how much of that should be regarded as bleed?]
Thanks for any help. We generate a fair number of titles, including a few with hardcover options. (And yes, I also miss the old one-click paper-to-hard conversion...)