Help with a cardi to go with this dress

[CakeInMyFace]

Apologies if this gets posted twice...
Just bought this today and now looking for a nice cardi to go over it - smart enough for the office. Am looking to spend under £20 on it, but really not sure what colour / style to get - long or cropped, navy or stone, etc. I'm rubbish at putting things together like this so looking for some help! Any ideas?
Thank you!

Hello. cute dress! I think i'd wear it with a limey green (as in the colour of a lime not Changing Rooms 1995 room colour) or zesty yellow cardi. I bought one in whistles yrs back and the colour looks great with navys and blacks. I'd say go for a slouchy style, wear with boots. Or if you plan to wear with heels maybe a cheap little blazer from zara? oh actually i walked past river island today and they had cute yellow ones in the window!

Dorothy Perkins has some nice cotton cardigans in various colours for that price

uniqlo (spelling?) had lovely soft blazers for £29 (I know you said £20 but were very nice)-I tried on a pale grey and a limey one. I think they were called cardigan jackets and you could wear them with converse and jeans or dress and heels.