Large swaddle blankets are great! Having the extra length on the blanket can come in handy when you are trying to swaddle your newborn. First, the extra cloth will make it easier to pull and tug to create a nice secure swaddle. The extra portion of the blanket can be easily tucked away to the side as part of the swaddle. The excess is great for growing babies as well, so the blanket can grow your newborn.
The largest swaddle blankets, I’ve seen is from Aden & Anais and they come in 47”x47” size. The 2nd largest blanket swaddle blanket that I’ve seen is 46” x 46” and Swaddle design calls them the Ultimate swaddling blanket.
The larger size swaddle blankets can come in handy for other things when your newborn is just too big for them. You can find read more reviews about swaddle blankets at http://www.BestSwaddleBlanket.com