I would like to know the width of the booster seat, please

Hi Josie, thank you for your enquiry, the Maxi Cosi has a width of 47cm, if this is too wide we do have the Evenflo Big Amp Booster which also has a width of 40cm. 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.