The Sugarhill brand is an English brand and this is the conversion of sizes to Spain or Europe.

 

sugarhill
XS	UK8	36
S	UK10	38
m	UK12	40
L	UK14	42
XL	UK16	44

 

Other brands
XS	3. 4
S	36
m	38
L	40
XL	42

 

For the rest of the market and brands, XS should be size 34 or UK8, but not for them, since it is their smallest size.