I love this style Converse better than the 'chunkier' soled ones. Very light on your feet and goes well with jeans, shorts, skirts or leggings.
I'd suggest going for just a tiny bit bigger than your usual size as I find them quite tight and narrow round the toe area(like add a half on).
I have the navy ones also, and they do eventually give. Don't wear them out in the rain, water tends to soak up through the bottom of the shoe nearest to the sole!!
Not really worth £40 and can find them cheaper else where but apart from that, a very comfy, stylish shoe looks good and I am happy with!!