At this time, our sets including pajama, bikini, tankini sets are sold as a complete set, and we are unable to offer different sizes for the top and bottoms within the same set. Like if you would like to get a top with size Large and shorts with size Medium, we recommend to choose the set with size Large.
If you would like to get short sleeve top to match long pants, it's an idea to purchase both short and long set to make the match.