How do I know of my Swaddle Up is too tight? I know it’s supposed to be snug, but my baby just hit 13lbs, which is the max size for a SM and the minimum size for the M.

His legs aren’t to long for the SM, his neck isn’t too big for the SM, but it is really snug across his middle.

I feel like the M is too loose to counter the Moro reflex, but I obviously don’t want to distress him by putting him in one that’s too tight.

Is anyone else using these swaddles? Thoughts?