Bar end for brompty

Hi all, sometime when i cycle i tend to put my hand in a way like im holding a barend when i do not have it on my brompton but i don not want to get one that is too big becos i do not want to expand my diameter of my foldy as i bring it on train often so any recommendation what shd i get for bar end that is just nice for the whole hand but not too big?

i have modified handlebars on my m type into flat bars and installed ergon gx2's with barends. they don't really affect the fold or increase folded size as the barends point inward when the brompton is folded. not really sure what kind of brompton you have though -- i'm thinking a standard m type with barends might drag on the floor. not really sure though.