Victoria secret sizing help

Megan
So for Valentine's Day i want to surprise my bf with some sexy underwear and just looking at the Victoria secret website at some stuff and sizing for the panties... It's really confusing me as I'm about a small for the waist line but on the hip one I'm an xs.. Any help? Not sure what size to go for? Thinking the small as that'd be comfier.. I'm 67cm on the waist and 87 on the hip.. That's like on the very very widest part..