Caitanya-caritāmṛta 21.84
kṛṣṇa kahe, “ei brahmāṇḍa pañcāśat koṭi yojana ati kṣudra, tāte tomāra cāri vadana
[krishna kahe, “ei brahmaanda panchaashat koti yojana ati kshudra, taate tomaara chaari vadana]
Blended reading (Sanskrit + English inline)
kṛṣṇa kahe, “ei brahmāṇḍa pañcāśat koṭi yojana ati kṣudra, tāte tomāra cāri vadana
“Kṛṣṇa said, ‘Your particular universe has a diameter of four billion miles; therefore it is the smallest of all the universes. Consequently you have only four heads.
Purport
Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura, one of the greatest astrologers of his time, gives information from the Siddhānta-śiromaṇi that this universe measures 18,712,069,200,000,000 × 8 miles. This is the circumference of this universe. According to some, this is only half the circumference.
— A.C. Bhaktivedanta Swami Prabhupāda
My note
Source: vedabase.io