This is the rectangle applique for a mug rug that is for the 5x7 hoop.
You can use it just for applique just don't add the back fabric.
This is a square applique for the 4x4 hoop that will fit your 5x7 hoop.
It is in the free DBC section.
Link to the square applique is below.
There is also a rectangle applique for the 5x7 hoop.
But you said you need square.
East Witch
The square applique is for a coaster.
You can use it for applique just don't add the back fabric and skip the next step to attach the back fabric and then just do the final satin stitch.
EastWitch2
Try these. Square Patch Applique Design
This design comes in a satin, vintage, zigzag, and raggy finish. Sizes Include:2 inch, 3 inch, 4 inch, 5 inch, 6 inch, and 7 inch
hope this will help?
good luck Marie, I'm sure another cutie will remember where!