I wonder

Sometimes I sew with a template, sometimes with some kind of measurement. Many times I just wing it, especially for prototypes. However, sometimes I do get requirements for specific measurements and while I try hard to meet these, it's, well, not so accurate. So, I wonder.... if this will fit :-)

Dimensions: 19.5cm x 10cm - SOLD

Update: this was intended for a specifc plastic box and thank God, it was a snug fit and I do not have to redo.