As I mentioned in an earlier post, I suspect the "curated collection" consists of the dresses brides ordered but never picked up. We've been told in earlier seasons when a dress is selected, the bride has to pay a deposit equal to 50% of its cost. The remaining 50% is paid after the dress arrives and either before or after the fitting appointments (not sure which).
When a wedding is cancelled, the bride can either pay the remaining 50% and take the dress anyway, OR lose their deposit and Kleinfeld keeps the dress.
The dresses that were ordered but for which the brides didn't pay the remaining balance are the dresses I think the brides are choosing from. That would mean there are going to be a limited number of styles/sizes from which they can choose.
Note: the markup on bridal gowns is 100%+ over wholesale cost. Therefore, Kleinfeld doesn't lose anything by giving those gowns away.
The other possibility is designers may have "donated" dresses for the event - in which case, that may also limit the style/size selection.
What we know for sure is these brides cannot choose from any style in the store, and the size range is limited, to get a free dress.
Of course the brides can choose to buy any dress from the store if they prefer to do so.
That bride needed to have a dress she could wear while driving her motorcycle, which means she couldn't have a dress that would drag on the ground or possibly get tangled in the wheels -which could kill her.
On September 14, 1927, the dancer Isadora Duncan was strangled to death when the scarf she was wearing got tangled in one of the wheels of her convertible.
Duncan's (extremely long) scarf somehow blew into the well of one of the rear wheels. It wound around the axle, tightened around her neck, and pulled her from the car and onto the cobblestone street.
She died instantly.
So you don't want to wear something long or too voluminous when driving, or riding on, a motorcycle.