An aircraft passenger seat unit comprising: - a passenger seat, the passenger seat having a seat pan and a backrest and the passenger seat being convertible between a seat configuration and a bed configuration, in which there is provided a bed surface at a bed height, - a shell at least partially surrounding the passenger seat and at least partially defining a planform of the seat unit, the planform having: ∘ a length from a first end of the planform to a second opposite end of the planform, ∘ a first end region across the first end of the planform, ∘ a second end region across the second end of the planform, and ∘ a middle region extending from the first end region to the second end region, wherein the second end region is offset from the first end region in a direction transverse to the length of the planform, the second end region being offset by an offset distance, the shell further comprising a moveable partition, the moveable partition being moveable between a raised position, in which it blocks a sight line to or from the seat unit, and a lowered position, in which the sight line is unblocked, wherein the moveable partition is located adjacent the middle region and wherein, when in the lowered position, the partition is located under the bed height; wherein the first end region has a first width and the second end region has a second width; characterised in that the first width and the second width are substantially the same such that the width of the planform at the first end is substantially the same as the width of the planform at the second end. - a passenger seat, the passenger seat having a seat pan and a backrest and the passenger seat being convertible between a seat configuration and a bed configuration, in which there is provided a bed surface at a bed height, - a shell at least partially surrounding the passenger seat and at least partially defining a planform of the seat unit, the planform having: ∘ a length from a first end of the planform to a second opposite end of the planform, ∘ a first end region across the first end of the planform, ∘ a second end region across the second end of the planform, and ∘ a middle region extending from the first end region to the second end region, ∘ a length from a first end of the planform to a second opposite end of the planform, ∘ a first end region across the first end of the planform, ∘ a second end region across the second end of the planform, and ∘ a middle region extending from the first end region to the second end region, wherein the second end region is offset from the first end region in a direction transverse to the length of the planform, the second end region being offset by an offset distance, the shell further comprising a moveable partition, the moveable partition being moveable between a raised position, in which it blocks a sight line to or from the seat unit, and a lowered position, in which the sight line is unblocked, wherein the moveable partition is located adjacent the middle region and wherein, when in the lowered position, the partition is located under the bed height; wherein the first end region has a first width and the second end region has a second width; characterised in that the first width and the second width are substantially the same such that the width of the planform at the first end is substantially the same as the width of the planform at the second end.