封 is a Chinese hanzi, listed here under the keyword “letter”. It is built from 圭 (jade pointed at top) and 寸 (inch). It appears as a component in 9 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “jade pointed at top” + “inch”. 封 is among the results, together with every other character containing the same shapes.
Open 封 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.