Imperial Comforts Sofa and Bed Pillow Inserts (4-Pack, 24x24 Inches)

24x24 is the right size for most standard covers so at least that part is sorted

the spec sheet just says 'comfortable' and moves on, which is exactly the part i needed to know about filling density and it tells me nothing

wonder if the fill actually holds its shape after a few months of use or goes flat, that's always the gamble with budget inserts