HaHa to the comment about my clothes falling off. The gui I have now ties on the sides although the area around my chest falls open quite often I am seriously thinking about adding a button there!
That is a strange description. A karate gi without a belt is a pajama... I have never heard of Japanese MA looking like that. The way I know it, when someone forgets a belt, there is a whole locker room of lost and found stuff where one can borrow one.
And no, buttons dont belong on a gi. Women usually sew a little extra string on the top part of the gi to close it there. You get that as a matter of course in the shop when you buy a gi here... not where you live?