Remember, cross-stitch is considered counted embroidery.
So count count count count again and double check your counting. It really helps minimize mistakes.
Gridding save you a lot of time (and your sanity too). Cross stitch is meant to be relaxing. Make your hobby hugely beneficial for your mental and physical health.
Material Type: Aida Generic White
Sewing Count: 14/inch or 55/100mm
Design Size: 17 x 16 stitches
Sewn Design Size: 1.2 x 1.1 inches or 31 x 29 mm
Suggested Material Size: 7.1 x 7 inches or 181 x 179 mm
Stitch Style: Cross-stitch Using 2 strands