i got an armload of Ipe offcuts from a door manufacturer about 9 years ago- and for a while all i did was make HBI bows, many of them bend thru the handle.
i gave so many away- but i have one left here on the shelf, its about #60 at my draw 31.5" from the days when i still shot 60 ponders- no more i am afraid.
it measures 68" ntn 1" wide in the handle. fades 1.5" long out to 1.25 " wide, then tapering all the way to the tips 3/8".
right at the fade the Ipe is be about 9/16" thick, and the tips , the Ipe is 3/8" thick,
this all had a 1/8" hickory 1/4 saw backing- so add 1/8" to those thickness measurements to get a true thickness.
the handle being a bit narrower looks to be about 5/8" thick+ the hickory of course.
hope that helps- it was my bow i took hunting in south africa last time i went!