An envelope closure on a pillowcase is a fabric flap at the open end. So there is no zip, button or other hard fastening. Many people choose it because it feels calm, looks neat on the bed and keeps most of the pillow out of sight. Still, the closure is not everything: size, fabric, use and the difference from an envelope closure on a duvet cover also affect how comfortable a pillowcase really is. Want to compare all materials and finishes? Explore our pillowcases.
How the flap at the open end works
With an envelope closure, an extra strip of fabric folds over the opening of the pillowcase. You slide the pillow in through that open end, after which the overlap covers the end. That means you do not see a hard or visible fastening and the pillow usually stays neatly out of sight. It is not a fully closed cover, though: the fit depends on the right size and enough overlap. In practice, people usually mean the same thing by pillowcase and pillow cover.
Zip or envelope closure: what you notice in bed
| Aspect | Envelope closure | Zip |
|---|---|---|
| Feel | No hard parts against your skin | Closes more tightly, but can be noticeable |
| Look | Neat and unobtrusive on the bed | More technical-looking and clearly closable |
| Practical if | You want softness and a neat look | You want the filling to shift as little as possible |
| Best choice | Depends on comfort, appearance and daily use | Depends on comfort, appearance and daily use |
Prefer that smooth, luxe hotel look that pairs well with an envelope closure? Consider our Silky Smooth pillowcases — and for styling tips, see how to make your bed like a hotel at home.
What to look for in size, fabric and use
- Check the size guide first. A 60 x 70 cm pillow is often standard, but a high, firm or unusual pillow needs extra attention. A pillowcase that is too tight pulls taut, while one that is too loose is more likely to look untidy.
- The fabric usually affects the sleep feel more than the closure does. Softness, warmth, breathability and suppleness vary by material, so throughout the night you notice which material suits you. If you prefer a natural, breathable option that closes neatly and feels comfortable, take a look at our organic cotton pillowcases.
- Think about how you use it. One pillowcase sits visibly on top of the bed and needs to look good, while another is mainly used as a practical, easy-to-wash layer. In that case, maintenance, drying time and keeping your bedding fresh matter more.
- Do not mix up material and closure. Satin and silk are about the material or weave, not about whether an envelope closure feels comfortable. So there is not one option that is automatically better for everyone.
On a pillowcase or duvet cover: this is the difference
On a pillowcase, an envelope closure means the overlapping opening you slip the pillow into. On a duvet cover, it usually means a wide flap or tuck-in strip at the bottom. The principle is the same: a hidden, neat finish without a visible fastening. Only the function and size differ. So always check the product description, because shops do not use this term in exactly the same way everywhere.
Want to make one yourself? These are the main steps
A pillowcase with envelope closure is perfectly possible to make yourself if you measure carefully and work calmly. These are the main steps:
- Measure your pillow and draft your pattern. Measure the length, width and, if needed, the height of the pillow if it is fairly full. Then work out not just the visible size, but also extra fabric for the envelope closure overlap and the seam allowance in your pattern.
- Lay out the fabric properly before cutting. Pay attention to the grainline so the pillowcase sits nicely straight. Does your fabric have a print, stripe or clear nap? Then check the pattern direction too. Mark straight away where the fold points and overlap need to go.
- Cut carefully and work neatly section by section. A slight skew will quickly show up later in the fit. So keep the lines straight and make sure the front and back pieces line up properly. Precise cutting makes a big difference, especially with a simple pillowcase.
- Finish the open edges first. The parts that will later form the inside of the envelope closure are best finished first with a hem or another neat edge finish. Then fold the overlap over as shown on your pattern and stitch it in place.
- Then stitch the sides closed. Place the fabric pieces right sides together, make sure the overlap is in the right place and stitch the outer edges closed. While sewing, check that the flap does not shift, so the opening keeps its shape nicely.
- Finish the seams and test the fit straight away. Finish loose seams neatly, turn the pillowcase the right way out and gently push out the corners. Then slip the pillow straight into the pillowcase. That way you can see at once whether the overlap is deep enough and whether the size fits neatly without pulling.
How we look at closures in bedding at SJUMO
At SJUMO, when we look at closures in pillowcases and duvet covers, we start with sleep comfort and everyday use. In practice, we find that feel, temperature and suppleness often make more difference than the closure alone, especially between Organic Cotton, Tencel Sateen and silky smooth. That is why we always link explanations about closures to size, fabric and care. For relevant products, we also mention certifications such as GOTS, OEKO-TEX and GRS, so your choice of material is just as clear as the finish.
