This pink Berghaus fleece from GO Outdoors is now my favourite fleece. It is very cosy and keeps me warm in all weather conditions and works extremely well when worn under a Berghaus jacket. The arms are a good length and the collar is high, keeping the heat in and keeping the body warm.
It is very soft and washes very easily. With regards to sizes, they are generous. Therefore, if not sure to buy a size 12 or 14, get the 12. If you're thinking of buying a Fleece Jacket I would recommend this one.