Picnic mats can be found at most outdoor stores. They can also be found at some online retailers. When looking for a picnic mat, it is important to consider the size of the mat. Some picnic mats are small and only fit one person, while others are large and can accommodate a group of people. It is also important to consider the material of the mat. Some picnic mats are made of cloth and can be easily folded up and transported, while others are made of plastic or vinyl and are less portable.