http://www.theverge.com/2015/7/6/8899807/instagram-1080p-pictures-photo-upload
The Verge recently made known the latest app versions of Instagram are uploading photo
You received
"standard_resolution": {
"url": "https://scontent.cdninstagram.com/hphotos-xfa1/t51.2885-15/s640x640/e35/sh0.08/11370971_837216559694773_771634899_n.jpg",
"width": 640,
"height": 640
}
It's possible to replace s640x640 with s1080x1080 or 2048x2048. Both this request return image with resolut 1080x1080
var hightUrl = data.images.standard_resolution.url.replace("s640x640","s1080x1080");