I also bought these masks, which are unisex and one-sized. Nevertheless, they fit me well and have a moldable nose wire to cover gaps. They're also made from a very light cotton muslin shell, almost light enough to see through. That makes it much more breathable for socially distanced walks and hikes.
Their lightness can also be a drawback. I might also pick a mask with thicker fabric if I frequented places that were more crowded than my local grocery store. I've been careful about handwashing and line-drying them, so they've lasted me since April. But if you use yours much more strenuously and frequently, you might want to try one that's more durable.