I believe they're not available direct from IKEA anymore but this is the listing https://www.ikea.com/qa/en/p/lenda-curtains-with-tie-backs-1-pair-dark-grey...
Never opened, never used
IKEA Lenda light filtering curtains (Kensington Brooklyn)
Collection Times
most weekdays before 2 or after 6pm; some weekends
most weekdays before 2 or after 6pm; some weekends
This offer has been gifted to someone and is no longer available.