Which boots to buy???

[lilysam]

Looking for some new boots but have no idea what kind to buy. I'm a SAHM always normally wear jeans for school run and playgroups.

Have been looking today and don;t know whether to go for brown, short, practical or knee high black? Have never yet done the tucked in look (not sure whether i'm too small and will look funny - 5ft4 and size 12 and soon to be bigger with pregnancy!!) Heels are a no-no as i just find them so uncomfortable chasing kids in them.

Any ideas?? Only popped into next and outfit today for 5mins with screaming dc's so any ideas would be great.

Thanks in advance stylish MNers!