The dress is made out of square motifs joined together.
It fits sizes S, M, L - with a belt for fitted look. For XL and larger - the number of square motifs must be modified per width row and as per length - it all depends on one’s preferences.
Please, note that even though i put an approximate gauge info, I found that the fabric gets larger when worn; so I’m guessing it’s ok to use a smaller hook like 1.4 mm or 1.3;
You’ll need at least One giant ball of aunt lydia’s crochet thread if the dress is worked in one singe color. Otherwise, all the other info is mentioned in the pattern.