So today, as well as babysitting a 5-month little baby all day, I managed to clean the house ((most of it)) rearrange Vince's room and write a tutorial on sewing fitted cotsheets! SUPERHERO! ((Duh, I'm Batman))
Instead of saying, use this measurement use that measurement, I'm going to try and explain how to do it yourself, because I know all cot mattresses are not alike!
This tutorial is super-duper easy! For novice seamstrixes ((Lol Stacey))!
Get your cott mattress, or measure it. The standard cot mattress size here in Australia ((I think ours is the largest of the standard sizes)) is 130cm length x 70cm width x 13cm depth. You're going to need roughly a little under 2m of fabric for this. The fabric I had wasn't quite long enough so I stitched some contrast red to the top and bottom ((You don't end up seeing it anyway as it turns out!)).
Fold up the sides a little bit. It should cover the depth of the mattress, plus fold over a bit. This much is probably too much ((unless you'll be hemming - then it's probably just right))
Do this for all the corners.
Get a corner
Fold the corner in half, right sides together, so that the edges you cut are matching up. It's ok if the edges of the sheet don't match up yet, just make sure the point evens out.
Pin and stitch ((and serge/overlock)) along this.
When you turn it back out it should look like this
And on the mattress.
Now you'll need some elastic. My little assistants brought it over for me, despite the Jedi Youngling in the background trying to stop him. Mm, the Force is strong in this one.
Stitch, stretching the elastic as you go.
Now put it on the mattress