Jersey heavy weight cotton

I want to start my own company making and selling baby slings. I want to make these out of soft cotton material. It needs to strech a little and be excellent quality cotton. I am looking for something such as jersey 200gsm weight plain white cotton. I also would like other colours in the future and maybe some nice printed one. I would consider ribbed cotton aswell. I would like some fabric samples to be sent to me before i place an order so that i can check the quality and if the fabric is suitable.

I would like to order a first order in a small quantity such as 50 metres.

I am also looking for some denim material which has strech in aswell.

Before I buy i would like free fabric samples sending to me, then my first order would be 50 metres of mixed colours of jersey cotton in 10metre lengths.