This Real Techniques by Samantha Chapman (Pixiwoo) Blush Brush is my most recent brush acquisition but it's become a firm favourite in my make up routine, so I think it would make an excellent stocking stuffer. I was a little sceptical about it at first as it's pretty huge for a blush brush, but it works best instead as a powder/bronzing brush or to wash out blush if you've applied it too heavily. While I would say it's too large to apply blush, it does deposit the perfect amount of colour. It feels gorgeously soft and is such a pleasure to use.
You can see some images below where I've put it next to MAC 168 and 138 brushes to give you a size reference. I actually prefer it a lot more to the 138 tapered face brush which I'd hankered after for ages but isn't as useful as I hoped it would be.
You can pick up this Blush Brush from Boots in store or online here for £9.99.