Covalent radius of carbon increases,
decreases or remains constant with increase
of s-character in the different hybridized
The covalent radius is a linear function ofs-character meaning that the shortening from sp3 to sp2 carbon is equal to that from sp2 to sp carbon and so on. The increase of s-character covalent radius in the different hybridized states of carbon decreases covalent radius of carbon.