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: 159 x 119 stitches
Sewn Design Size: 11.4 x 8.5 inches or 289 x 216 mm
Suggested Material Size: 17.3 x 14.4 inches or 439 x 366 mm
Stitch Style: Cross-stitch Using 2 strands