qmk_firmware/keyboards/handwired/k_numpad17/info.json

{
    "keyboard_name": "K-Numpad17",
    "url": "",
    "maintainer": "qmk",
    "width": 4,
    "height": 5,
    "layouts": {
        "LAYOUT_numpad_5x4": {
            "layout": [
                {"x": 0, "y": 0},
                {"x": 1, "y": 0},
                {"x": 2, "y": 0},
                {"x": 3, "y": 0},

                {"x": 0, "y": 1},
                {"x": 1, "y": 1},
                {"x": 2, "y": 1},

                {"x": 0, "y": 2},
                {"x": 1, "y": 2},
                {"x": 2, "y": 2},
                {"x": 3, "y": 1, "h": 2},

                {"x": 0, "y": 3},
                {"x": 1, "y": 3},
                {"x": 2, "y": 3},

                {"x": 0, "y": 4, "w": 2},
                {"x": 2, "y": 4},
                {"x": 3, "y": 3, "h": 2}
            ]
        }
    }
}