I was making the 24" cushion covers and as l plopped it down it just sort of fell into a square although l had made it as a straight cushion afterwards i found that some made pot holders the same way
MAKING A CUSHION BAG
1st...l wanted a cushion with no ends and minimal sewing together when finished
So l did a long chain then dc down one side of the chain PLUS one stitch EXTRA at the end then, back up the other side and add another dc the other end, sl st to complete the round.
24" CUSHION BAG PATTERN
I made my 24" cushions using 2 strands of DK and a 6mm hook,
Chunky and a 6mm hook.
Aran and a 5mm hook.
For my tension l did a Ch50, you lose 2 chain with the first dc [tr], as you turn and work into the 3rd ch from the hook as the first dc,
but gain them back with the extra 2 st increase one each end.
If using acrylic then try to keep your stitches quite tight adjust without size and the yarn will stretch a bit and be too big for your cushion pad after some use.
50sts and 39 rows
Straight forward and easy, you keep going until you have a bag big enough to fit the cushion
Adjust this number of sts, for your size of cushion and keep the stitches as tight as possible.
Add a Button band
Sew together 2" each side of the open end and add a crocheted button band of sc [dc], to fill the remaining space but 6 rows.
Add 4 or 5 buttons to the band which sits inside the opening and use the stitches as button holes
Diagonal cushion bag
On dropping the bag, it fell into a square a couple of times accidentaly, so the next one l made was made exactly the same way but with enough stitches to make the diagonal length of an 18" cushion
for me that was 60sts..using 2 strands of DK and a 6mm hook
but you only need to do 21 rows fold the sides in and it makes a square
hey presto a
DIAGONAL CUSHION MADE ON THE STRIAGHT
looks like this until you do the folded sides
open it out and fold the diagonal sides into the centre and this is what you have...
keep going until it meets easily in the centre...
don't stretch it to fit it must be flat and easily meet.
When you are happy with the fit sew up a couple of inches each end of the opening and add a button band in the same way as for the straight cushion bag
this is what it looks like half done, a quick and easy diagonal cushion bag
Try using hdc [htr], instead, another great stitch for cushions
Have fun