Letter size consistency.
Whether letters of the same class come out the same height.
What size consistency means
Size consistency compares the height of letters that should match. Most lower-case letters share one height, the x-height, and the factor asks how much that height varies across the page.
It is measured as variation rather than as an absolute size. Large handwriting and small handwriting both score well as long as they are consistent; what costs points is the same letter appearing at noticeably different heights within a few words of itself.
Why it matters
Readers use size to group letters into words. When size drifts, the eye keeps re-anchoring, and reading gets slower even though every individual letter is legible.
It also carries a lot of information about control. Size is the first thing to wander when a hand is tired or rushing, so a page that starts even and grows uneven towards the bottom is describing endurance, not letter knowledge.
What a good page looks like
A good page reads as though an invisible pair of lines runs across it. Lower-case letters reach the same height, capitals sit at a consistent larger height, and the ratio between them stays the same from the first line to the last.
What usually pulls the score down
- No ruled guide, so nothing is anchoring the height.
- Fatigue, which usually makes writing grow rather than shrink.
- Rushing towards the end of a line and compressing to fit.
- Switching between print and cursive forms that naturally sit at different heights.
How to practise it
Write inside two lines, close enough together to be a real constraint, until the height is automatic. Then move to single-ruled paper and finally to plain paper, which is the actual test: the height has to survive without the guide.
If the problem is drift down the page rather than variation within a line, treat it as an endurance problem instead. Shorter bursts with the hand shaken out between them will do more than any size drill.
The drill the report prescribes
Write inside two guide-lines so every letter reaches the same height.
How Vahini measures it
A scanned page gives the analyser the finished writing, not the movement that produced it, so this factor is read from letter-height consistency and reported as such. The Vahini pen senses the movement directly, which is the difference between inferring how a page was written and recording it.
Questions
Is large handwriting bad?
No. The factor measures consistency, not size. Large even handwriting scores better than small uneven handwriting.
My writing gets bigger as I go down the page. Why?
That is the standard fatigue pattern. As the hand tires the movement comes more from the arm and less from the fingers, and the letters grow with it.
See this factor in your own handwriting
The analyser scores a photo of a handwritten page on all twenty factors, names the two worth working on first, and prescribes the drills for them. It is free, it needs no pen, and it is an educational tool rather than a medical assessment.