Goods
Printed planes beyond the business card — letterhead, envelope, postcard, sticker — all in true millimeters, all built by one rule: the arrow at the content origin, horizontal margin ≈ width/16 on the power-of-two scale, vertical margin derived from the arrow's ratio. White and black survive every reproduction, so a sticker and a letterhead age at the same speed: not at all.
The arrow opens the page; the body sets on the 12-column grid below it. The footer is one Rule and one Annotation — sender, address, nothing else.
235×120, the standard Japanese business envelope (A4 folded in thirds). The arrow is the only mark on the face; the sender line sits on the lower grid.
JIS postcard. The arrow up top, the message area left open; one Rule anchors the foot. The white field is the design — print nothing else on it.
A mark-only surface: the white field and the arrow, half the columns wide. Nothing else earns a place on 64mm.
The inverted twin — the same rule on the black field. Two stickers, one geometry.