Envelopes for private correspondence should be of a suitable size, allowing for the writing paper to only be folded once or twice. They should have gummed diamond flaps.

Traditionally the colour should match the writing paper; more contemporary styles may be of a tastefully contrasting colour.

More expensive envelopes can be tissue lined, again either in a matching or contrasting colour - a sign of quality and individuality.

See Miss Debrett on Stationery

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