For reference, here is the file sizes and some table sizes from my database:

ls -l *.ibd|sort -k 5 -n -r|head -n 28-rw-rw---- 1 mysql mysql 2654994432 Feb 28 13:30 action_logs.ibd
-rw-rw---- 1 mysql mysql 1551892480 Feb 28 12:53 import_records.ibd
-rw-rw---- 1 mysql mysql 1283457024 Feb 28 13:30 biblioitems.ibd
-rw-rw---- 1 mysql mysql  801112064 Feb 28 13:28 deleteditems.ibd
-rw-rw---- 1 mysql mysql  511705088 Feb 26 10:28 deletedbiblioitems.ibd
-rw-rw---- 1 mysql mysql  490733568 Feb 28 13:30 zebraqueue.ibd
-rw-rw---- 1 mysql mysql  440401920 Feb  6 14:55 patronimage.ibd
-rw-rw---- 1 mysql mysql  197132288 Feb 28 13:30 statistics.ibd
-rw-rw---- 1 mysql mysql  197132288 Feb 28 13:25 auth_header.ibd
-rw-rw---- 1 mysql mysql  163577856 Feb 28 13:29 old_issues.ibd
-rw-rw---- 1 mysql mysql  142606336 Feb 27 15:22 import_items.ibd
-rw-rw---- 1 mysql mysql   83886080 Oct 24  2012 sessions.ibd
-rw-rw---- 1 mysql mysql   75497472 Feb 28 13:30 items.ibd
-rw-rw---- 1 mysql mysql   58720256 Feb 28 12:53 import_biblios.ibd
-rw-rw---- 1 mysql mysql   50331648 Feb 28 13:25 biblio.ibd
-rw-rw---- 1 mysql mysql   30408704 Feb 26 10:28 deletedbiblio.ibd
-rw-rw---- 1 mysql mysql   27262976 Feb 28 13:30 accountlines.ibd
-rw-rw---- 1 mysql mysql   20971520 Feb 28 13:30 borrowers.ibd
-rw-rw---- 1 mysql mysql   15728640 Feb 28 13:30 issues.ibd
-rw-rw---- 1 mysql mysql   15728640 Feb 28 12:05 search_history.ibd
-rw-rw---- 1 mysql mysql   15728640 Feb 28 11:15 message_queue.ibd
-rw-rw---- 1 mysql mysql   12582912 Feb 27 15:21 import_record_matches.ibd
-rw-rw---- 1 mysql mysql   11534336 Feb 28 11:33 old_reserves.ibd
-rw-rw---- 1 mysql mysql   10485760 Feb 28 13:01 creator_batches.ibd
-rw-rw---- 1 mysql mysql    9437184 Oct 24  2012 auth_subfield_structure.ibd
-rw-rw---- 1 mysql mysql    9437184 Nov  7 14:27 deletedborrowers.ibd
-rw-rw---- 1 mysql mysql    9437184 Feb 28 12:58 accountoffsets.ibd
-rw-rw---- 1 mysql mysql    9437184 Feb 26 12:39 borrower_message_preferences.ibd

mysql> select count(*) from biblio;
+----------+
| count(*) |
+----------+
|   121725 |
+----------+
1 row in set (0.02 sec)

mysql> select count(*) from items;
+----------+
| count(*) |
+----------+
|   201075 |
+----------+
1 row in set (0.10 sec)

mysql> select count(*) from borrowers;
+----------+
| count(*) |
+----------+
|    33620 |
+----------+