DS (11mo) is long but skinny (15th centile for weight) but the "birth to potty" Pop-ins I got don't look like they'll fit him much longer. They're already on the biggest setting, and the velcro tabs are almost at their limit. Interested to know if they lasted much longer than 12 months for others (I know that rate of growth generally slows down after this).
We've got some Flip Bum Genius which look like they'll last a lot longer. Resigning myself to having to fork out for more of these...