The star-patterned swaddle is size M, and the polka dot ones are both size L. Both polka dot swaddles are genuine Swaddle Up products, but the stores they were purchased from are different, so one tag is in Japanese and the other is in English, and the tag positions are also different. According to the manufacturer's website, the star-patterned M is for 3-6 months (6-8.5kg), and the polka dot L is for 6 months and up (8.5-11kg). It seems that swaddles are more effective when worn snugly. All were purchased when my first child, born in the summer of 2023, was born. I remember that my first child slept well in a swaddle, so I often used them until around 4-5 months old, but my second child, born in the fall of 2025, doesn't seem to like them and only used them a little during the newborn period. These are the all-season type. I also plan to list mesh ones made of summer-friendly material. Please also read my profile to prevent any trouble. I will not respond to unreasonably large price reductions or price negotiations without a specific amount mentioned.