Lay the T-shirt flat on a clean surface
Smooth out any wrinkles
Mark the cutting lines with chalk or fabric marker
Cut off the sleeves if desired
Cut along the neckline if desired
Cut the hem for a cropped look if desired
Cut the sides or back for a looser style if desired
Use sharp fabric scissors
Cut slowly and evenly
Check both sides for symmetry
Remove loose threads
Try on the shirt and adjust if needed