I have used pre-build static libs of OpenSSL 1.0, but it makes my binary too big, (increase its size by about 800Kb in release mode).
I do not need most of the featu
I think you want this page, particular the section on code size:
https://en.wikipedia.org/w/index.php?title=Comparison_of_TLS_implementations&oldid=585386367#Code_size_and_dependencies
(dated December 2013)
update: Alas no longer a part of the updated page.