"middle-sized" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "middle-sized (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1900 May 17, L[yman] Frank Baum, “The Queen of the Field Mice”, in The Wonderful Wizard of Oz, Chicago, Ill.; New York, N.Y.: Geo[rge] M[elvin] Hill Co., →OCLC, page 103:",
          "text": "They came from all directions, and there were thousands of them: big mice and little mice and middle-sized mice; […]",
          "type": "quote"
        }
      ],
      "glosses": [
        "Of a medium size"
      ],
      "id": "en-middle-sized-en-adj-ou74I~Za",
      "links": [
        [
          "medium",
          "medium"
        ],
        [
          "size",
          "size"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "middle-sized"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "middle-sized (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English parasynthetic adjectives",
        "English terms with quotations",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1900 May 17, L[yman] Frank Baum, “The Queen of the Field Mice”, in The Wonderful Wizard of Oz, Chicago, Ill.; New York, N.Y.: Geo[rge] M[elvin] Hill Co., →OCLC, page 103:",
          "text": "They came from all directions, and there were thousands of them: big mice and little mice and middle-sized mice; […]",
          "type": "quote"
        }
      ],
      "glosses": [
        "Of a medium size"
      ],
      "links": [
        [
          "medium",
          "medium"
        ],
        [
          "size",
          "size"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "middle-sized"
}