diff --git a/docs/configuration/config-file-reference.md b/docs/configuration/config-file-reference.md
index 4dcc15cd14a..756ac0bd3ae 100644
--- a/docs/configuration/config-file-reference.md
+++ b/docs/configuration/config-file-reference.md
@@ -2181,6 +2181,11 @@ bucket_store:
 # CLI flag: -experimental.tsdb.head-compaction-concurrency
 [head_compaction_concurrency: <int> | default = 5]
 
+# The number of shards of series to use in TSDB (must be a power of 2). Reducing
+# this will decrease memory footprint, but can negatively impact performance.
+# CLI flag: -experimental.tsdb.stripe-size
+[stripe_size: <int> | default = 16384]
+
 # limit the number of concurrently opening TSDB's on startup
 # CLI flag: -experimental.tsdb.max-tsdb-opening-concurrency-on-startup
 [max_tsdb_opening_concurrency_on_startup: <int> | default = 10]
diff --git a/docs/operations/blocks-storage.md b/docs/operations/blocks-storage.md
index 2ac5d6479b0..464126eb579 100644
--- a/docs/operations/blocks-storage.md
+++ b/docs/operations/blocks-storage.md
@@ -176,6 +176,12 @@ tsdb:
   # CLI flag: -experimental.tsdb.head-compaction-concurrency
   [head_compaction_concurrency: <int> | default = 5]
 
+  # The number of shards of series to use in TSDB (must be a power of 2).
+  # Reducing this will decrease memory footprint, but can negatively impact
+  # performance.
+  # CLI flag: -experimental.tsdb.stripe-size
+  [stripe_size: <int> | default = 16384]
+
   # limit the number of concurrently opening TSDB's on startup
   # CLI flag: -experimental.tsdb.max-tsdb-opening-concurrency-on-startup
   [max_tsdb_opening_concurrency_on_startup: <int> | default = 10]
diff --git a/pkg/storage/tsdb/config.go b/pkg/storage/tsdb/config.go
index 19b3fd8f1cf..20822a2f8fe 100644
--- a/pkg/storage/tsdb/config.go
+++ b/pkg/storage/tsdb/config.go
@@ -116,7 +116,7 @@ func (cfg *Config) RegisterFlags(f *flag.FlagSet) {
 	f.IntVar(&cfg.MaxTSDBOpeningConcurrencyOnStartup, "experimental.tsdb.max-tsdb-opening-concurrency-on-startup", 10, "limit the number of concurrently opening TSDB's on startup")
 	f.DurationVar(&cfg.HeadCompactionInterval, "experimental.tsdb.head-compaction-interval", 1*time.Minute, "How frequently does Cortex try to compact TSDB head. Block is only created if data covers smallest block range. Must be greater than 0 and max 5 minutes.")
 	f.IntVar(&cfg.HeadCompactionConcurrency, "experimental.tsdb.head-compaction-concurrency", 5, "Maximum number of tenants concurrently compacting TSDB head into a new block")
-	f.IntVar(&cfg.StripeSize, "experimental.tsdb.stripe-size", 16384, "Power of 2 to use for the number of shards of series to use in TSDB. Reducing this will decrease memory footprint, but can negatively impact performance.")
+	f.IntVar(&cfg.StripeSize, "experimental.tsdb.stripe-size", 16384, "The number of shards of series to use in TSDB (must be a power of 2). Reducing this will decrease memory footprint, but can negatively impact performance.")
 }
 
 // Validate the config