I was searching the internet to try and find the right size gift boxes. I ordered 30 white flat pack gift boxes from https://www.aplpackaging.co.uk/gift-boxes/flat-pack-boxes/white.html because the dimensions of the boxes 310 L x 310 W x 140 H mm was just the perfect size for packaging my work. I was happy with the online ordering and next day delivery, but soon felt a bit disappointed after taking my tape measure to check the actual size of the box. I am not sure if there is a mistake with the dimensions in the website or the actual size of the gift box I ordered. The size I measured was 301 L mm x 301 W mm x 138 H mm (approx). The length and width of the box is around 9mm short. The object i was hoping to package is around the same dimensions I measured for the box so It is a very tight fit, but I can manage to use the box for the other smaller items.