Amazon really comes into its own with items like this. I could have scoured the shops for hours looking for a card that had the combination of '30' and 'sister' and come away empty-handed. Luckily, a quick search on amazon came up with this beautiful card. Muted tones, and larger than average size (almost A5, i'm guessing) with a paper insert too. My sister really liked it, and I looked like I'd gone to a lot more trouble than I actually had!