I purchased this for my son who wanted to be Cookie Monster.  I bought the 3t-4t size as he wears 4t clothes and it fit very well. Overall, the quality is good for a Halloween costume.  The fabric is a bit thin, so if you live in a cold climate you'll want to wear warmer clothing underneath.  It was easy for him to put on, and comfortable as he wore it the whole night without any complaints.  Overall, happy with this purchase.