I would like to grow the above. Looking through seed catalogues I can't find ones which specify size. Has anyone grown any? My cauliflowers and cabbages are far too big for what I need. Thanks for any replies.
With cabbages, you could try planting them a bit closer and picking them when they are at the size you want.
Have a look for a Cauli called Locris, you can plant them quite close and get mini cauli, as for cabbages the smallest i have ever grown is Greyhound again plant them closed together
Found these that could suit your needs:
Cabbage:
http://www.dtbrownseeds.co.uk/seeds-plants-gardening/15862/cabbage-minicole-f1-agm-seeds?gclid=CJLltZTYvbgCFQTMtAodbAgAcQ
Cauliflower:
http://www.thompson-morgan.com/vegetables/vegetable-seeds/brassica-and-leafy-green-seeds/cauliflower-amazing/ta01085TM