Photographs can be printed at almost any shape and size that you require.  The most common are as follows:
(Please be aware, prices  may changed without warning.)

Photograph Sizes:
12″ x 8″ : £7
18″ x 12″ : £8

Poster Sizes:
16″ x 24″ : £15
24″ x 36″ : £20

Canvas sizes:
16″ x 24″ : £55
20″ x 30″ : £70

Photograph Sizes:
8″ x 12″ : £7
12″ x 18″ : £8

Poster Sizes:
16″ x 24″ : £15
24″ x 36″ : £20

Canvas sizes:
24″ x 16″ : £55
30″ x 20″ : £70

Photograph Sizes:
8″ x 8″ : £7
12″ x 12″ : £8

Poster Sizes:
16″ x 16″ : £15
24″ x 24″ : £20

Canvas sizes:
12″ x 12″ : £35
16″ x 16″ : £40
20″ x 20″ : £55