Measuring

The most reliable way to measure the doors and drawers is to measure the existing one you already have. You will probably get a more accurate figure if you measure the backs of the doors/drawers as the fronts often have sloping or curved edges. 

Most kitchen cabinets are 300, 400, 450, 500, or 600mm wide and the correct width of a door for these cabinets is 4mm less than this (which leaves enough space for the doors to open without colliding).
The common widths of door/drawers are: 296, 396, 446, 496 and 596mm. 

Most kitchen cabinets are 575, 720 or 900mm high and the space for most drawers is 145, 180 or 288mm high. It is convention to leave 5mm between doors and drawers, and between drawers in stacks of drawers. Thus the common sizes are 5mm less than the space.
The common heights of doors/drawers are: 140, 175 283, 570, 715, 895 and 1245mm. 

If the dimensions you measure are near these figures but not exactly these figures, we suggest you check your measurements. But the sizes of the doors/drawers in your kitchen could be completely different from these. There is no problem; we can still supply them. 

Very large and very small doors/drawers
Generally, all designs of door are available in all sizes shown in the price grids. However, there are a few exceptions:
Aluminium: Maximum height and width - 1245mm, 600mm. Minimum height and width - 300mm, 165mm. 
Doors with glass: Maximum size - 895mm by 496mm. Minimum height - 300mm, width is 270mm. 
Vinyl contemporary doors: Minimum width - 252mm (blank panels are also available for doors/drawers under this width).