Ashish is the brand. here is a listing for the pants https://www.lyst.com/clothing/ashish-sequin-houndstooth-track-pants-brown/

follow the link to below it will lead you to the the shop.

https://m.economictimes.com/magazines/panache/designer-ashish-gupta-the-indian-connect-between-taylor-swift-miley-cyrus/articleshow/49138723.cms

Here's the website https://www.lyst.com/clothing/ashish-sequin-houndstooth-track-pants-brown/

This is the link: https://www.tailorbrands.com/lp-home?utm_source=google&utm_medium=cpc&utm_campaign=741404043&utm_content=41604015834&utm_term=%2Btailor%20%2Bbrands&gclid=Cj0KCQjwn7j2BRDrARIsAHJkxmyuII7RlJQnXUWjxtGqpswXmvGJMvGcKADVeNss3ykLRuCjhkCfOE4aAjlKEALw_wcB

try this https://taylorswiftstyle.com/