Freestanding cookers are all roughly the same height and depth, but they come in 3 standard widths of 50, 55 and 60cm, so you can make sure the cooker you buy will fit into the right size gap in your kitchen.
If you’re a busy cook you’ll value the extra cooking space a freestanding cooker with 2 ovens offers. On a double-oven cooker, you’ll find a grill in the top oven and sometimes there’s one in the main oven too.
Freestanding cookers with one oven and a separate grill offer you two cooking cavities, but only the larger, lower cavity has an oven; you’ll find the grill in the smaller cavity.
Freestanding cookers with single ovens and integrated grills are the cheapest kind of cooker. They come with one large cooking cavity which contains both the oven and grill, so that restricts what you cook and when.