I got a small Bantry and I'd say it's pretty big for a day to day bag. Not big enough for a laptop or to be a work bag, but if it's a handbag alternative it's more than big enough. I use it for days out with my 3 year old.
Currently it's holding spare trousers and top, several pairs of pants, a pair of gloves, a pack of baby wipes, two packs of tissues, a small squash bottle, keys, purse and phone.
With all that, it's about 2/3 full and I could definitely slide a tablet into the internal pocket as well.