I can’t figure out which size halo swaddle is safe for my baby.

I’ve been using a muslin swaddle for my baby with her arms out (she hates being swaddled with arms in) but am wanting to switch her to a halo swaddle since a couple times now she’d kicking out of the bottom of the muslin swaddle. I like that with the halo one you can have arms out.

My problem is I can’t figure out what size is safest for her. She’s very long so she’s already past the max length for the newborn size, but she’s a couple pounds below the minimum for the small size. What size would you use?