442kb for XML-LibXML-2.0014.tar.gz 
uncompressed size 1.90MB size 
uncompressed size on disk 2.42MB

after building/make dance its
3.52 MB (3,693,052 bytes) / 4.16 MB (4,370,432 bytes)

after installation its
663 KB / 760KB

plus 25MB in prerequisites ( libxml2mingw  )
560kb includes
8.09MB dll/exe (the minimal true prerequisite)
8.14MB libs (.a)
7.51MB share (docs...)