Somewhere around fifty, a woman decides her shoulders are no longer anyone's business.

Nobody tells her to. It just happens, one sensible neckline at a time, until every dress she owns has sleeves, or a jacket over it, or both.

I am Ellis, and I started Ellis & Rose on one belief: that beautiful style is not defined by age, trends or rules. And I have watched that quiet rule about shoulders cost women more lovely evenings than any other.

Because in my experience it has things exactly backwards. The line of the collarbone and the shoulder is one of the most graceful things a woman has, at any age. It is often the part she is least worried about, and the part she covers first.

So when an occasion comes along, a wedding, an anniversary dinner, a celebration in the garden, she reaches for the same covered-up dress she always does, and wonders afterwards why she looks in the photographs like she was attending rather than celebrating.

I never accepted that she had to cover up to look appropriate.

The Elora is one dress built on that refusal. There were six things I would not do without.

An occasion is never a short one. There is the ceremony, then the reception, then a long dinner in a room that gets warmer as the evening goes on. The Elora is made in light, breathable chiffon that lets the air through and never clings, and the skirt is cut full so it moves every time she does. Stiff fabric photographs stiff. Chiffon catches the light, and the eye follows the movement of the dress rather than the shape underneath it.

Most floral dresses carry a small, busy print, repeated edge to edge until it stops being flowers and becomes a pattern. The Elora is a sweeping watercolor floral with oversized blooms in soft, painterly tones, the kind of print that looks like somebody actually painted it. It is the difference between wearing a pattern and wearing a picture. And it comes in three colorways, navy, pink and lavender, so she picks the one that feels like hers.

The middle is where most occasion dresses go wrong. They cinch hard because a cinched waist looks good on a hanger, and by the time the speeches start she cannot wait to get out of it. The Elora has a crossover detail at the waist that gives it shape, set on a smocked band that gives with her. Definition where she wants it, and room to sit through a long dinner without thinking about it.

The Elora normally sells for $169.95. But summer is over at the shop, and every year at this time we clear the rails to make room for what comes next.

I almost kept the Elora out of the sale, because it is not really a summer dress. It is a dress for occasions, and occasions do not stop in September. There are autumn weddings, anniversary dinners, the holidays. So I decided the opposite: I would rather it went to women now, while those invitations are arriving, than sat in the stockroom until spring.

For the Final Summer Sale it is $69.95. There are only so many of each size in each color, and when one goes, it goes.