Aida cloth is the most common fabric for cross stitch projects so you need to know which count Aida cloth you should use and how many strands of thread.
CHAT] What is the point of 20-count Aida? Started the Evergreen
Finding the Right Cross Stitch Fabric – Okayest Crafter
Satisfy your itch to stitch! This fabric makes a perfect base for all of your cross stitch projects. Aida cloth is an open-weave, even-weave fabric
12 Pack: 18 Count Aida Cloth Cross Stitch Fabric by Loops & Threads™, 29.5 x 36
Aida, linen or evenweave? Differences and count / CloudsFactory
What does fabric count mean in cross stitch? - Stitched Modern
Cross stitch fabrics explained
Fabric size calculation: how much fabric you need for cross stitch
Cross stitch calculator - changing fabric count changes project size
Examples of Coverage Across Different Thread Counts
Cross stitch calculator - changing fabric count changes project size