In fact, these Spider-Man and Iron Man sets appear to be the first where Lego has specifically referred to them as busts.

A new line of Lego Marvel mini-busts has been unveiled, with the first two characters being Iron Spider-Man and Iron Man MK4.

The life-size Black Panther LEGO bust was ... It also includes a nameplate and a removable Iron Man minifigure. The Iron Spider-Man bust is inspired by Avengers: Infinity War, and features ...

Lego is bringing Iron Man and Spider-Man to your bookshelf with the mini bust series, with a price point a bit higher than the standard, but not unheard of for Marvel sets.