Letter project – Art of Ruby

This page details the setup and format of small watercolour works that can be sent cheaply and internationally by international letter or small letter. They are designed to work with C5 and C4 board backed envelopes for the noted postage service respectively.

The limits of standard and large letter sizes and weights are given below:

Letter size	Dimensions (metric, cm)	Dimensions (imperial, inches)
Standard	24 x 16.5 x 0.5	9.4 x 6.5 x 0.2
Large	35.3 x 25 x 2.5	13.9 x 9.8 x 2.5

The maximum weight of the standard is 100g and large letter prices increase from 100g . It is assumed that the artwork and packaging is unlikely to exceed 100g so either will work

The C5 and C4 envelope sizes are given below:

Envelope size	Dimensions (metric, cm)	Dimensions (imperial, inches)
C5	22.9 x 16.2	~9 x 6.35
C4	32.4 x 22.9	~12.75 x 9

The mount sizes, which are intended to be used with the images, whether or not they are supplied with them are as follows:

Image size	Mount size
6 x 4**	8 x 6
7 x 5*	9 x 7
8 x 6*	10 x 8
10 x 8	12 x 10***
12 x 8	16 x 12***

All dimensions are in inches ; *standard letter, no mount ; **standard letter, with mount ; ***mount cannot be included

The following gives a matching between the desired mounts and the image sizes taking account of a desired border size between image and mount (set here as following but can be changed as desired):

Desired image mount size (inches)	Border (cm)	Image size (cm)	Envelope size
6 x 4	0.25	14.74 x 9.66	C5*
7 x 5	0.5	16.78 x 11.7	C5
8 x 6	0.5	19.32 x 14.24	C5
8 x 6	0.5	19.32 x 14.24	C4*
10 x 8	0.75	23.9 x 18.82	C4
12 x 8	0.75	28.98 x 18.82	C4

*can be sent with mount present ; main target sizes are highlighted with bold writing

If the paper sizes are to be cut out to the mount size as above, for the standard letter sizes, it would be wise to add at least 3/4 inch onto each of the sides from the mount size to ensure that each piece can be stretched on a board well enough. The following are rough cuts from a 70 x 50 cm standard paper size to give such individual sections for inclusion with 6 x 4″ mount:

9″ x 6.5″	9″ x 6.5″	9″ x 6.5″
9″ x 6.5″	9″ x 6.5″	9″ x 6.5″
9″ x 6.5″	9″ x 6.5″	9″ x 6.5″

(also working for 7 x 5 if desired and no mount included)

And for gettin the largest 8 x 6″ mount image sizes with A5 letter size, without including mount:

9″ x 9.8″	9″ x 9.8″	9″ x 9.8″
9″ x 9.8″	9″ x 9.8″	9″ x 9.8″

To get the pieces for the 8 x 6″ image mount sizes (and no mount included)

It should be noted that in each of the above, the paper size will have to be trimmed down slightly to fit the envelope though.