Breaking out of Swaddle

Emily

Our 7w old is getting too long for her swaddleme Velcro swaddles and is also regularly getting her hand out of the top. She also arches her back a lot to the point of almost rolling in the Love to Dream arms up swaddle.

She seems to small (almost 10lb) to swaddle arms out or use the Merlin sleepsuit that starts at 3mo size.

What would you all recommend?