Plaid

Levi's jeans

A plaid shirt

Plaid was a pattern consisting of horizontal and vertical lines overlapping each other. Tartans were a pattern of plaid associated with Scottish clans. (TOS: "Is There in Truth No Beauty?", TNG: "Sub Rosa")

Thaddeus Troi-Riker had plaid sheets on his bed. (PIC: "Nepenthe")

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