Size Not Working?

Is the size referring to the size of the image? Because I’m getting no difference if the size is small or large.

In request like:
https://api.thedogapi.com/v1/images/search?limit=1&mime_types=png,jpg&size=small

[
{
“breeds”: [
{
“weight”: {
“imperial”: “38 - 50”,
“metric”: “17 - 23”
},
“height”: {
“imperial”: “23 - 26”,
“metric”: “58 - 66”
},
“id”: 8,
“name”: “Alaskan Husky”,
“bred_for”: “Sled pulling”,
“breed_group”: “Mixed”,
“life_span”: “10 - 13 years”,
“temperament”: “Friendly, Energetic, Loyal, Gentle, Confident”
}
],
“id”: “ryqWuE_1T”,
“url”: “https://cdn2.thedogapi.com/images/ryqWuE_1T.jpg”,
“width”: 900,
“height”: 1200
}
]