@Pradeep-Jaiswal I don't believe individual profile/fragment size is currently exposed.
The size of the Profile store can be seen in the Preview sample status endpoint:
GET https://platform.adobe.io/data/core/ups/previewsamplestatus
That would give you the overall size as well as the fragment count, from which you can derive the average fragment size.
Profile richness is usually driven by event bloat. In that respect using Time-To-Live (TTL) should help:
- ExperienceEvent TTL (EE TTL) per dataset to stick to what the segmentation really needs.
- Pseudonymous TTL (P‑TTL) to drop unknown profiles.