The heights of the Welsh 3,000s does vary (slightly) according to reference. These heights are as accurate as can be determined.
Welsh 3000s - A4 Poster Print is unframed,
A4 - 210 x 297 mm
 
Printed on a smooth 250gsm silk
NB - where a border is visible, please note that this is part of the overall design of the print and not a separate mount.