Suboo Yellow Chartreuse Bikini Bottoms sz XS - NWT

Suboo Swim Neon Green Yellow Chartreuse 'Summit' Bikini Bottoms size AUS 8 US 4 Extra Small, new with tags, made in Australia, bikini bottom, cut-out/three straps at hip outseams, 87% polyester, 13% spandex, ~12.5" across hips, I bought these going with the AUS/US size but they ended up too small for me--I believe XS is the true fit