DIY Oval bassinet mattress and crib sheet – help needed

Well…that was a long time to stay tuned :). Looks like my plan to make 25 items in 50 days is not going to happen, since it seems this baby wants to come early and I’m now on couch rest till next week. In contrary to her last-last minute mom, she’s more ready I guess :). Still have to install the car seat, finish the bassinet, the nursery (not that important for now), my suitcase wasn’t packed (now it’s about 90% packed) and some other things. Buy lots of stuff (I always thought babies didn’t need much, but in week 31 we only had about 10% of the must-have list, haha). Plenty of stuff to do, but I can do a lot while sitting on the couch (sorting fabric, yarn, papers, doing laundry).

I guess highest priority was finishing the bassinet mattress and crib sheets. Luckily I had been working on those before being put on rest, haha.

We borrowed this bassinet from a friend and to reduce SIDS risk I decided not to re-use the mattrass. The bassinet is an odd size, so a new mattress is not for sale anywhere, most are way too small, which is dangerous too.

Making one was the only solution. I bought 1″ high density foam at JoAnns for a total of $9, traced the old one and cut it. 1″ foam seems thin but high density says it all, it’s as thick as the Restoration Hardware original.

I made a flannel cover for it. Internet suggests using vinyl backed flannel to make a waterproof cover, but no way I’m using PVC on a baby mattress (off-gassing, you know). I opted to use a friendlier PEVA (PVC-free, chlorine-free, biodegradable) shower curtain from Ikea, but I’m just not sure if something plastic-y will make the mattress sweaty and noisy.

So I made a flannel cover and will use a thick flannel sheet (molton I think?? the US doesn’t know this word) on top of it. Hope that works. Otherwise, I’ll need to go back to JoAnn again after the first accident :P.

Here’s the mattrass and the cover. The cover required a lot of handstitching and it’s not as snug as I wanted. Hope it will work. I serged the edges, just to make myself proud and I like a professional finish.




So far, so good.

But here is where the problem started. Now I want to make a couple of quick crib sheets.
There are several options:

– an envelop pillow-cover-style bassinet sheet, but it requires a lot of fabric that you won’t see.
– a sheet with a band, similar to the actual mattress cover, for a better fit. Would require more work and still an elastic casing
– a sheet with elastic casing, but no band. The problem is, this is an oval shaped mattress…

The problem

Apparently I’m the only one with this problem, because I can’t find anything about this on the internet, but I have no clue how to make an elastic casing in a curved/oval bassinet sheet. You can’t -at least not in a neat way- make a rounded casing.

This is what happens if you do. Looks terrible. Yep here the casing is already stitched. Like I said, looks terrible.


Despite the popular Stokke Sleepi crib that has a oval mattress, I can’t find anything about this on the internet.

With rectangular crib sheets, you cut away the excess of fabric, but an oval shape or round edge would require a lot of notching, but how much?? I’m quite clueless.

I tried attaching the elastic to the serged edge right away, which would have been the perfect solution, but I suck at attaching elastic while holding it stretched. There must be an easier way to make a better crib sheet.

I tried gathering the fabric, but I don’t know how that would help. Still leaves me with the same problem, it still looks messy in the corners.

I should have cut the top of the sheet just straight I think and made the rounded edge as small as possible. Maybe I’m just trying to make it too neat??!

I still want to make another one, after struggling with this problem for a long time. I think I’ll start of with a rectangular shape first and then see how that fits.

All my work on the oval crib sheet did work out in the end, and no one will see the messy elastic casing, but I’m just not satisfied with such imperfection :P. There must be someone with a solution for this!


This last picture shows how the permanent mattress cover could have been more snug, although I do admit that the sheet is really quite tight and barely fits.

PS1. The bassinet will not be put in front of the window, don’t worry :)

PS2 This is as much light pink as I can handle :P Haha.

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  1. Tessa says: August 29, 20142:32 am

    I don’t see the problem, I think the bottom picture looks fine! How else should it look?

    • nienke says: August 29, 20142:16 pm

      The end result is fine, but the empty casing just looks horrible. Don’t you think there should be a more esthetically pleasing way? :)

  2. Tessa says: August 30, 201410:28 am

    I don’t generally think fitted sheets are esthetically pleasing :P. You did a good job.

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