diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5d58eb987..f184adbb9f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,6 +35,7 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 ### Removed
 
 - [#5824](https://github.com/thanos-io/thanos/pull/5824) Mixin: Remove noisy `ThanosReceiveTrafficBelowThreshold` alert.
+- [#5819](https://github.com/thanos-io/thanos/pull/5819) Store: Add a few objectives for Store's data touched/fetched amount and sizes. They are: 50, 95, and 99 quantiles.
 
 ## [v0.29.0](https://github.com/thanos-io/thanos/tree/release-0.29) - 2022.11.03
 
diff --git a/pkg/store/bucket.go b/pkg/store/bucket.go
index a7a5d3abd9..973642d06d 100644
--- a/pkg/store/bucket.go
+++ b/pkg/store/bucket.go
@@ -168,21 +168,25 @@ func newBucketStoreMetrics(reg prometheus.Registerer) *bucketStoreMetrics {
 	})
 
 	m.seriesDataTouched = promauto.With(reg).NewSummaryVec(prometheus.SummaryOpts{
-		Name: "thanos_bucket_store_series_data_touched",
-		Help: "How many items of a data type in a block were touched for a single series request.",
+		Name:       "thanos_bucket_store_series_data_touched",
+		Help:       "Number of items of a data type touched to fulfill a single Store API series request.",
+		Objectives: map[float64]float64{0.50: 0.1, 0.95: 0.1, 0.99: 0.001},
 	}, []string{"data_type"})
 	m.seriesDataFetched = promauto.With(reg).NewSummaryVec(prometheus.SummaryOpts{
-		Name: "thanos_bucket_store_series_data_fetched",
-		Help: "How many items of a data type in a block were fetched for a single series request.",
+		Name:       "thanos_bucket_store_series_data_fetched",
+		Help:       "Number of items of a data type retrieved to fulfill a single Store API series request.",
+		Objectives: map[float64]float64{0.50: 0.1, 0.95: 0.1, 0.99: 0.001},
 	}, []string{"data_type"})
 
 	m.seriesDataSizeTouched = promauto.With(reg).NewSummaryVec(prometheus.SummaryOpts{
-		Name: "thanos_bucket_store_series_data_size_touched_bytes",
-		Help: "Size of all items of a data type in a block were touched for a single series request.",
+		Name:       "thanos_bucket_store_series_data_size_touched_bytes",
+		Help:       "Total size of items of a data type touched to fulfill a single Store API series request in Bytes.",
+		Objectives: map[float64]float64{0.50: 0.1, 0.95: 0.1, 0.99: 0.001},
 	}, []string{"data_type"})
 	m.seriesDataSizeFetched = promauto.With(reg).NewSummaryVec(prometheus.SummaryOpts{
-		Name: "thanos_bucket_store_series_data_size_fetched_bytes",
-		Help: "Size of all items of a data type in a block were fetched for a single series request.",
+		Name:       "thanos_bucket_store_series_data_size_fetched_bytes",
+		Help:       "Total size of items of a data type fetched to fulfill a single Store API series request in Bytes.",
+		Objectives: map[float64]float64{0.50: 0.1, 0.95: 0.1, 0.99: 0.001},
 	}, []string{"data_type"})
 
 	m.seriesBlocksQueried = promauto.With(reg).NewSummary(prometheus.SummaryOpts{