what diaper do you recommend

Re
My son was a preemie at 35 weeks so he's been wearing preemie diapers. But he's gotten a lot bigger since then. (7 weeks now and weighs 8 pounds) the preemie diapers are to small but I tried fitting him into diapers that are 8 pounds but the diaper is to big for him. Do you guys recommend any diapers that might fit him?