Sister, sister!

Khloe Kardashian and Kylie Jenner wore pretty much the same outfit for a family trip to Costco in Los Angeles on April 29. While stocking up on bulk grocery items (and filming their E! reality series, naturally), the Keeping Up With the Kardashians half-siblings wore red-and-black plaid flannels, black T-shirts, light blue jeans, and black boots.

However, each sister tweaked the matchy-matchy outfit to fit her personal style. Jenner, 16, opted for an oversized plaid shirt and ripped jeans with a messy ponytail while Kardashian, 29, looked slightly more polished. She wore knee-patch jeans and styled her long ombre hair in glam waves.

"Kylie and Khloe take Kostco #Flannel #Sisters #BFF," Kardashian tweeted along with a pic of the two.

Kris and Bruce Jenner were also on hand for the outing and helped load up their car with big-box staples like toilet paper and paper towels.