ICS X-ray (International Code of Signals) Holographic STICKER Die-Cut Vinyl Decal

A blue equal-arm cross sits on a white square, a flat, graphic reduction of the letter X from the maritime signal flags.

Composition in Two Colours

White covers most of the field, and the blue cross takes up the remaining share. The cross is a Greek-style design with four arms of equal length, meeting at a centre point and reaching toward the edges of the square. Because the artwork uses only these two colours and simple geometric forms, the cross reads instantly from a distance. There is no text or numeral within the design; the name carries the identification.

Signal Flags and the Letter X

The International Code of Signals is a standardised system of flags that ships use to communicate at sea when radio is unavailable or unnecessary. Each flag stands for a letter of the alphabet, and the flag for X signifies that a vessel should stop carefully. The spoken word for X in the NATO phonetic alphabet is "X-ray," which is how the design is named. The code itself was developed by maritime authorities over the nineteenth and twentieth centuries and is the work of those international signalling bodies, not of any single designer.

Made for a Cut Outline

A blue cross on white is a shape defined entirely by its outline, which makes it a natural fit for a die-cut sticker. The cut follows the edge of the cross and the square around it, so the sticker itself becomes the symbol rather than a rectangle carrying one. Set it on a notebook, a laptop lid, or a flat surface where a single bold shape can stand alone, and the sticker reads as a signal flag hung on that surface.