revelation19 answered:

Well, according to Ezekiel 1 they might look something like this…

According to Daniel 10 something like this…

According to Isaiah 6…

In Ezekiel 10…

Again in Ezekiel 10…

Basically, when the people writing Scripture tried to describe what they saw when they saw an angel… they run into the end of their imagination… they can never quite seem to fully explain it because they had trouble even comprehending what they saw, let alone being able to describe it to someone else.