Pregnancy pillow bed-footprint dataset (UK)

Pregnancy pillows are sold on comfort and returned because of space. This dataset publishes the width of pregnancy pillows set against the three standard UK mattress widths (single 90 cm, double 135 cm, king 150 cm), and the percentage of the mattress each pillow covers. Five of the six rows are pillows sold by Pregnancy Pillow UK. All their figures come from the supplier listings. None are independent measurements. We are a shop, not a laboratory, and we state this so the figures can be judged accordingly. The bbhugme row is the manufacturer's stated dimension, attributed as such. The Body Bolster width is not published and is left blank rather than estimated. Filled pillows compress, so these figures are an upper bound, which is the useful bound when the question is whether a partner will still have room. Method, licence and limits are documented in README.md. Source and contact: https://pregnancy-pillow.co.uk Correction, version 3 (23 September 2026): earlier versions described the figures as our own tape measurements, which we cannot document. They are relabelled as product specifications, and The Bump Lounger row is corrected to the supplier figure of 170 x 65 x 22 cm (previously 165 x 80 cm). Correction, version 4 (25 September 2026): version 3 gave The Bump Wing as two pieces of 42 x 26 x 14 cm and 40 x 24 x 12 cm. No supplier document supports those figures. The supplier listing states 64~78 x 36 cm, where 64 to 78 cm is the adjustable length from one wing to the other, lying across the bed in use. The Wing is now listed at both band settings: 47.4 to 57.8 per cent of a UK double, not 19.3. The Full Body U and The Body Bolster figures are no longer described as supplier data: they come from our product pages. Correction, version 5 (25 September 2026): the supplier listing of The Full Body U gives 70 x 130 cm and 1.3 kg in its own specification image. Earlier versions gave 140 x 80 cm. The U now covers 51.9 per cent of a UK double (not 59.3). The Body Bolster row now cites its supplier listing (length options up to 130 cm, round, diameter not published).