{
  "basis": "Independent assumed size and coverage study; no product or experimental validation",
  "anchor_mm": [
    68,
    30
  ],
  "growth": "Fixed lower-right corner; expand left and upward toward battery source patch. Area and coverage change together. Not a universal size-only law.",
  "cases": {
    "small": {
      "label": "Small \u00b7 24 \u00d7 30 mm",
      "footprint_mm": [
        44,
        30,
        68,
        60
      ]
    },
    "reference": {
      "label": "Stage 05 \u00b7 30 \u00d7 50 mm",
      "footprint_mm": [
        38,
        30,
        68,
        80
      ]
    },
    "large": {
      "label": "Large \u00b7 50 \u00d7 70 mm",
      "footprint_mm": [
        18,
        30,
        68,
        100
      ]
    }
  }
}