diff --git a/libs/pageserver_api/src/models.rs b/libs/pageserver_api/src/models.rs
index 13a9b5d89e..b1ebad83b1 100644
--- a/libs/pageserver_api/src/models.rs
+++ b/libs/pageserver_api/src/models.rs
@@ -1476,8 +1476,14 @@ pub struct TenantScanRemoteStorageResponse {
 #[derive(Serialize, Deserialize, Debug, Clone)]
 #[serde(rename_all = "snake_case")]
 pub enum TenantSorting {
+    /// Total size of layers on local disk for all timelines in a shard.
     ResidentSize,
+    /// The logical size of the largest timeline within a _tenant_ (not shard). Only tracked on
+    /// shard 0, contains the sum across all shards.
     MaxLogicalSize,
+    /// The logical size of the largest timeline within a _tenant_ (not shard), divided by number of
+    /// shards. Only tracked on shard 0, and estimates the per-shard logical size.
+    MaxLogicalSizePerShard,
 }
 
 impl Default for TenantSorting {
@@ -1507,14 +1513,20 @@ pub struct TopTenantShardsRequest {
 pub struct TopTenantShardItem {
     pub id: TenantShardId,
 
-    /// Total size of layers on local disk for all timelines in this tenant
+    /// Total size of layers on local disk for all timelines in this shard.
     pub resident_size: u64,
 
-    /// Total size of layers in remote storage for all timelines in this tenant
+    /// Total size of layers in remote storage for all timelines in this shard.
     pub physical_size: u64,
 
-    /// The largest logical size of a timeline within this tenant
+    /// The largest logical size of a timeline within this _tenant_ (not shard). This is only
+    /// tracked on shard 0, and contains the sum of the logical size across all shards.
     pub max_logical_size: u64,
+
+    /// The largest logical size of a timeline within this _tenant_ (not shard) divided by number of
+    /// shards. This is only tracked on shard 0, and is only an estimate as we divide it evenly by
+    /// shard count, rounded up.
+    pub max_logical_size_per_shard: u64,
 }
 
 #[derive(Serialize, Deserialize, Debug, Default)]
diff --git a/pageserver/src/http/routes.rs b/pageserver/src/http/routes.rs
index 77bfab47e0..e5848bfd25 100644
--- a/pageserver/src/http/routes.rs
+++ b/pageserver/src/http/routes.rs
@@ -3223,6 +3223,7 @@ async fn post_top_tenants(
         match order_by {
             TenantSorting::ResidentSize => sizes.resident_size,
             TenantSorting::MaxLogicalSize => sizes.max_logical_size,
+            TenantSorting::MaxLogicalSizePerShard => sizes.max_logical_size_per_shard,
         }
     }
 
diff --git a/pageserver/src/tenant.rs b/pageserver/src/tenant.rs
index 3a34c8e254..62e1cdac0c 100644
--- a/pageserver/src/tenant.rs
+++ b/pageserver/src/tenant.rs
@@ -3842,6 +3842,7 @@ impl Tenant {
             resident_size: 0,
             physical_size: 0,
             max_logical_size: 0,
+            max_logical_size_per_shard: 0,
         };
 
         for timeline in self.timelines.lock().unwrap().values() {
@@ -3858,6 +3859,10 @@ impl Tenant {
             );
         }
 
+        result.max_logical_size_per_shard = result
+            .max_logical_size
+            .div_ceil(self.tenant_shard_id.shard_count.count() as u64);
+
         result
     }
 }