Downton - how old are the daughters?

[strawberrie]

What age do you reckon the girls are meant to be?

Mary must be about 27, Edith 25 and Sybil 23 - ish. All old and on the shelf. Spinsters. No heir and standards collapsing around our ears.

Mary was definitely aged 22 during the first series as she had already been out in society for four seasons, so she must be around the 26/27 mark now.

Edith is 25
Sybil is 21
Mary is 27
Its all in this week's Radio Times