Custom Block Icons

I can't get my custom block to display as a normal block, Eg size and display in inventory or player's hand.
I tried to edit the Json file but I don't know the value to display it as a normal block:

{
  "parent": "biomeplus:block/hollow_acacia_log",
  "display": {
      "gui": {
          "rotation": [30, 255, 0],
        "translation": [0, 0, 0],
        "scale": [0.625, 0.625, 0.625]
      },
      "ground": {
        "rotation": [0, 0, 0],
        "translation": [0, 3, 0],
        "scale": [0.25, 0.25, 0.25]
      },
      "fixed": {
        "rotation": [0, 0, 0],
        "translation": [0, 0, 0],
        "scale": [0.5, 0.5, 0.5]
      },
      "thirdperson_righthand": {
        "rotation": [75, 45, 0],
        "translation": [0, 2.5, 0],
        "scale": [0.375, 0.375, 0.375]
      },
      "firstperson_right": {
        "rotation": [0, 45, 0],
        "translation": [0, 0, 0],
        "scale": [0.40, 0.40, 0.40]
      },
      "firstperson_lefthand": {
        "rotation": [0, 225, 0],
        "translation": [0, 0, 0],
        "scale": [0.40, 0.40, 0.40]
      }
  }
}