I brought blinds for my house and was not the right size will i be able to exchange for smaller size

You can return them within 7 days and then purchase the size you need

If they have the size you need in stock they will let you exchange. If not they will give you a refund with 7 days of purchase or store credit after 7 days.

within one day of purchase. I would talk to them. they might exchange if they have more.

They allowed me to exchange them for another size with no problem