Pillow covers sell in six sizes, and buyers search by the number on their insert. A size chart that pairs every cover with its insert and its sofa position removes the top pre-purchase question in the category — and cuts the "wrong size" return line to nearly zero.
The complete retail size chart
| Cover size | Insert size | Sofa position | Velocity |
|---|---|---|---|
| 30×50 cm (12×20 in) | 35×55 | Lumbar, front of stack | High |
| 40×40 cm (16×16 in) | 45×45 | Secondary square | Highest |
| 45×45 cm (18×18 in) | 50×50 | Base square | Highest |
| 50×50 cm (20×20 in) | 55×55 | Oversized base, sectionals | Medium |
| 35×35 cm (14×14 in) | 40×40 | Small accent, front | Medium |
| 65×65 cm (26×26 in) | 70×70 | Euro sham, bed & deep sofa | Seasonal |
Rule everywhere: insert 2-5 cm larger than cover for the plump corner look. The fill choices behind each insert are in the insert fill guide; counts per sofa are in the sectional staging numbers.
Which sizes should a first order stock?
Three: 45×45 base, 40×40 secondary, 30×50 lumbar — the triangle that styles any sofa. Add 35×35 accent when the assortment skews boho (small squares finish the stack) and 65×65 euro only if bedding or deep-sofa clientele shows up in your sales data. Euro shams are a bed category wearing a sofa costume: they spike with bedding season, not decor season.
Why do lumbar covers punch above their size?
They are the silhouette breaker: a horizontal line across a square stack is what makes an arrangement look designed. Lumbar also carries the highest margin per fabric meter — less cloth, same price band as squares. The lumbar-specific retail-display notes are in the lumbar wholesale guide.
Do size mixes differ by style line?
Yes, slightly: boho walls run heavier on 40/45 squares and lumbar (stacked texture); light-luxury lines add 50×50 for deeper sofas; Nordic minimal runs 45 + one lumbar, nothing else. The style lines' own charts are in the boho cushion wall and Nordic white-green guides.
How do listings communicate size without returns?
Put cover size AND recommended insert size in the title line ("45×45 cover, fits 50×50 insert"), repeat both in the first bullet, and photograph the cover on its correct insert — an under-stuffed photo generates "looks flat" reviews even when the buyer's insert is the wrong one.
Valvive's cotton-linen square covers with optional matched insert span the chart's working sizes, from 3 pieces per size, mixable across styles in one low-MOQ DDP order. Request a quote; pricing returns in 1-2 business days.