First grade handwriting paper

By first grade most children can control a smaller letter, so the rows tighten. The dashed mid-line stays, because letter height is still the thing most often got wrong — the difference between a well-formed 'h' and a well-formed 'n' is entirely how far above the mid-line the stroke goes.

This is the ruling that matches most first-grade exercise books, so work done at home looks like work done at school.