Things You Didn't Know About Harry Potter Wizarding Wands

Wands come in a wide range of lengths, but the large majority seem to fall within the 9" to 14" range. However, a few are known to exist outside this range, such as Lucius Malfoy's wand (Elm, 18", dragon heartstring, unyielding) or the one wielded by Dolores Umbridge (Birch, 8", dragon heartstring). Ollivander issues this caution concerning matching wands with owners based on length: "Many wandmakers simply match the wand length to the size of the witch or wizard who will use it, but this is a crude measure, and fails to take into account many other, important considerations. In my experience, longer wands might suit taller wizards, but they tend to be drawn to bigger personalities, and those of a more spacious and dramatic style of magic. Neater wands favour more elegant and refined spell-casting."

In some cases, large wands are needed due to some "physical peculiarity" (such as gigantism), but oftentimes they are a reflection of an owner's dramatic or larger-than-life personality. There doesn't seem to be a connection between a small wand and small stature—despite Umbridge's diminutive size. Indeed, Ollivander finds that "abnormally short wands usually select those in whose character something is lacking."