Will this fit a 16 month old boy?

Hi Cindy, Thank you for your enquiry, the Britax B Safe is not as suitable for a 16mth old as they would not get much use from it or any at all if we are honest, the weight limit is 15.8 kgs so they may be close to this is not the height maximum which is Seated Shoulder Height: 16.5 – 27.9 cm. We do have a full range of Toddler seats that maybe suitable instead I have added a link here: https://www.babyonthemove.co.nz/car-seat/toddler-car-seat. We hope this helps.  if you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our online store finder. Here you can find contact details for your nearest Baby On The Move Store where one of our team experts will be happy to assist you in your product search and help answer any further questions you may have. We hope this has helped with your query.