Hi Rosie! We thank you for your interest in our beds. Stella Low Sleeper - Pink is available to order at only £219.11/€273.89. The bed takes a Standard UK Single Mattress (90cm x 190cm) - for safety reason and to maximize the bed height, we usually recommend a low-profile mattress to use for this bed. We have some low-profile mattresses available that perfectly fits into this bed such as the Tara Single 3ft Mattress (Low Profile) - £82/€102.50 and the Symphony De Luxe Mattress 3ft Low Profile 190cm (top bunk beds) - £199.00/€248.75. Regarding assembly, if you want our experienced worker to do the job, we're can also get it done at an extra £60/€65 only. Our assembly service is carried out by trained professionals that includes a complete assembly and removal of all the rubbish and packaging. Should you require the assembly service, please contact our sales team so we can add it to the order as we also need to organize this ahead of time. Let us know if you need anything else. Cheers! - Mark, Love Furniture