Openssl sha1 length

Question

Why after executing the command openssl sha1 < /dev/null | wc --bytes the output is 50? The output size of SHA-1 should have 160 bits what gives us 20 bytes.

Answer 1

Why is the output of openssl sha1 < /dev/null | wc --bytes 50?

$ openssl sha1 < /dev/null
(stdin)= da39a3ee5e6b4b0d3255bfef95601890afd80709

Because the 20 byte digest is prefixed by (stdin)= and is expressed in hex.