The perfect size of a recliner is totally dependent on the length of your femur; you want the back of your knees to be at the edge of the chair when your lower back is snug and supported by the base of the back support. Really, you need to sit in a chair to see if it fits, or at least in a chair of similar dimensions.
Check the returns policy, it might be the case that you can order a chair and test it for a day then send it back, but as they’re pretty heavy and cumbersome items, it’s likely that the returns policy will be on the strict side.