Underwear-type absorbent article

An underwear-type absorbent article comprising:

• an absorbent body that comprises a liquid-absorbent absorbent core;
• a belt part that comprises:
• a ventral waistline part disposed on one end side in a longitudinal direction of the absorbent body, and
• a dorsal waistline part disposed on another end side in the longitudinal direction;
• and
• a plurality of crotch elastic strings that is disposed in the absorbent core and stretchable in the longitudinal direction, wherein
• the underwear-type absorbent article has a first size,
• a dimension of the absorbent body in a stretched state is a same as a dimension of an absorbent body in a stretched state of another underwear-type absorbent article of a second size,
• a dimension of the belt part when in a stretched state is a same as a dimension of a belt part in a stretched state of the other underwear-type absorbent article, and
• at least one of a number of the crotch elastic strings, a contraction force of the crotch elastic strings, and a disposition area of the crotch elastic strings are larger than a number of crotch elastic strings, a contraction force of the crotch elastic strings, and a disposition area of the crotch elastic strings of the other underwear-type absorbent article.