Sleepyhead delux or grand?

[1Potato2]

I've got a 12 week old who is struggling to sleep other than in our arms dusting the day. He is 50th centile but quite long. I'd really appreciate whether you can advise me on which size of Sleepyhead to buy please? I've read that they outgrow the first size quickly, but the larger size might be too big to give the cocooning effect.

Thanks in advance.

I've got the deluxe, for upto 6 months and Archie is on the 75th percentile for height and 50th for weight and it does look like he would have grown out of it. But it's done him brilliantly so far, he's 17 weeks. I'm planning on getting the grand for when we put him in the cot in his own room x