Should I get a small puku bath tub with stand for my newborn? Or should I get a L size? Or not buy?

I started bathing my newborn a week after birth. Not easy at first but she loves bath times after a couple more baths. L size is definitely helpful because my newborn moves her limbs a lot and that gives her some space to do just that. When the baby is bigger, you still are able to bathe your newborn without it being a white elephant.