Apron styles have changed over the years, and continue to do so.
When we started, they were just below your knees, probably copied from laprobes in Coaching. Those are more of a blanket to go across the lap, keeping you both warm and covered from dust. Just no one had aprons that were longer than midcalf.
However nothing stays static in showing, and with many newer folks coming in, there were changes in attire, apron “shaping” as already mentioned. All the old aprons are really square or straight edged. Reasons for changes were mentioned, straight edges don’t always fit well, don’t stay tucked in on every body shape.
Length kept getting longer, for various reasons. Some think it makes “a better line”. Others wanted “total coverage” so they COULD do the jeans, shorts, less casual dress underneath, to save time or for comfort. More length allows BIGGER monograms! It was actually dangerous for a shorter time, when aprons covered the shoes. People tripping on the edges, catching a foot in them entering or leaving the vehicles. It got so there was someone standing next to a vehicle BECAUSE we always expected the person getting in or out with an apron WOULD trip or fall!! I have caught more that a couple people who stumbled over their aprons.
EVERYONE saw the other people with long aprons, so they kept wanting the long aprons too. Even AFTER have tripped or almost fallen wearing them!! Kind of a vicious circle there in Fashion For Driving. Folks do seem to have gotten more sensible about the safer, SHORTER lengths needed nowadays.
But younger Judges, Driving observers, have gotten a mistaken notion that extreme length is REQUIRED to be correct on an apron, with the scores marked down to penalize the shorter lengths. Certainly not so in the Rules of classes. Aprons are STILL supposed to be for keeping the Driver and clothing clean, not designed as the main articles of Attire. Maybe that is “Judges Opinion” in marking a Pleasure Class.
Older Judges, going by Traditional rules, WANTED the skirt or slacks, to show at the lower edge of apron. They mentioned it at several Clinics I attended, specifically. Skirt check requirment at shows was MUCH easier if they could see the skirt when turning back the Apron edge. Some mentioned getting the way shorter skirt along with the apron edge on the turn back check, revealing more leg than they wanted to see!! Of COURSE they said that DID NOT influence their choices!! Their preferred apron length then was mid calf or lower calf, not ankle or foot length.
The pattern I see used most often now, has flared sides, with straight across on the top and bottom. Narrower at waist, with wider width at the bottom edge. Monogams have moved from the center of apron to the lower outside corner.
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Above is extreme example, just to show flared angle well. The top area SHOULD go around your whole body, hip area, to meet or overlap in the rear, then flare a bit more to hang well at the lower leg. They often have darts, shaping over the hips, so you are not dealing with huge wads of material when seated. Apron should sit above your natural waist area on front for coverage protection. Coat over or under, seems to be equal among drivers except in the big carriages, with Multiples in front. Then the apron or lap robe is always over the coat or jackets. A short skirted ladies jacket is not going to stay tucked under well, if using your arms with reins much.
Above all, the apron should be comfortable, something you forget about having, when you start the driving part. Should not flap or annoy you, need to be retucked constantly, as you go along.
Lot to ask from a piece of cloth! Sure glad I am usually the Groom, no call for an apron.