Sweden 228B, Croatia 41.5kB. And kids in first year of school should know how to draw flag from memory :(. SVG file size should be good indicator to see if flag is to complex.
Roman Mars taught me that – well Ted Kaye, but Roman taught me in his seminal TED talk [1].
3 worst
-rw-r--r-- 1 197121 395610 Feb 4 15:19 do.svg Dominican Republic
-rw-r--r-- 1 197121 187525 Feb 4 15:19 rs.svg Serbia
-rw-r--r-- 1 197121 118305 Feb 4 15:19 bo.svg Bolivia
3 best
-rw-r--r-- 1 197121 225 Feb 4 15:19 pl.svg Poland
-rw-r--r-- 1 197121 215 Feb 4 15:19 de.svg Deutschland
-rw-r--r-- 1 197121 191 Feb 4 15:19 bd.svg Bangladesh