Shoulder width of Seat

Hi Mel, Thank you for your enquiry. We apologise that we don’t have the specifications available for shoulder width on our website because the manufacturer’s instructions are more based on height, weight and age. However, we have measured the inside of the Frontier’s minimum shoulder width which is 35-37cm with the maximum wings spread towards the top is 46cm which will give you a general indication. We do really recommend contacting your nearest store to try your child in the Britax Frontier Clicktight to make sure it is suitable and can be fitted properly. We hope this helps.  For further information on this or any of our other products available, 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.