∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  [inst_2 : SizeOf C] (X : C) [comon : CategoryTheory.ComonObj X],
  sizeOf { X := X, comon := comon } = 1 + sizeOf X + sizeOf comon