Research shows a double layer, quilt-quality-cotton mask to be the most effective non-medical mask. The quality and relative comfort of these masks makes them worth a possible bit of extra attention in the beginning. These masks are medium size if we are talking ear-to-ear. Some reviewers of masks by the same maker say they are too big. They must be referring to the quantity of fabric top to bottom. If you find this a problem, simply stretch the mask flat and iron the "pleats" firmly into place. Now you can control how far you open up the mask. Spread top and bottom, allowing the more central area to stay pleated. Easy. You might need to repeat ironing after each of the fist few washings. Soon the fabric will conform enough you can reinforce the pleats by merely running your hand across the flattened mask a few times before wearing. I didn't need to do any of this. I only experimented to find a solution.