diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9fdec075d..206c0e828 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 - Updated to rand 0.10.x
+- Added `unique_tag_ratio` field to the OpenTelemetry metrics `Contexts` config, allowing control over attribute cardinality. Defaults to `0.75`; set to `1.0` for fully unique attributes on every emission.
 
 ## [0.32.0]
 ## Changed
diff --git a/lading_payload/benches/opentelemetry_metric.rs b/lading_payload/benches/opentelemetry_metric.rs
index 587ebeb3a..6e8902e03 100644
--- a/lading_payload/benches/opentelemetry_metric.rs
+++ b/lading_payload/benches/opentelemetry_metric.rs
@@ -28,6 +28,7 @@ fn opentelemetry_metric_setup(c: &mut Criterion) {
                     attributes_per_scope: ConfRange::Inclusive { min: 0, max: 4 },
                     metrics_per_scope: ConfRange::Inclusive { min: 1, max: 128 },
                     attributes_per_metric: ConfRange::Inclusive { min: 0, max: 255 },
+                    unique_tag_ratio: 0.75,
                 },
             };
             let _ot = OpentelemetryMetrics::new(config, MIB, &mut rng)
@@ -57,6 +58,7 @@ fn opentelemetry_metric_throughput(c: &mut Criterion) {
                             attributes_per_scope: ConfRange::Inclusive { min: 0, max: 4 },
                             metrics_per_scope: ConfRange::Inclusive { min: 1, max: 128 },
                             attributes_per_metric: ConfRange::Inclusive { min: 0, max: 255 },
+                            unique_tag_ratio: 0.75,
                         },
                     };
                     let ot = OpentelemetryMetrics::new(config, size, &mut rng)
diff --git a/lading_payload/src/opentelemetry/metric.rs b/lading_payload/src/opentelemetry/metric.rs
index 609aa5767..b56cf72e6 100644
--- a/lading_payload/src/opentelemetry/metric.rs
+++ b/lading_payload/src/opentelemetry/metric.rs
@@ -84,6 +84,10 @@ pub struct Contexts {
     pub metrics_per_scope: ConfRange<u8>,
     /// The range of attributes for each metric.
     pub attributes_per_metric: ConfRange<u8>,
+    /// Fraction of attributes that are unique vs. reused. 1.0 means every
+    /// attribute is unique; 0.01 means nearly all attributes are reused from
+    /// the existing pool. Valid range: 0.01 to 1.0.
+    pub unique_tag_ratio: f32,
 }
 
 impl Default for Contexts {
@@ -95,6 +99,7 @@ impl Default for Contexts {
             attributes_per_scope: ConfRange::Constant(0),
             metrics_per_scope: ConfRange::Inclusive { min: 1, max: 20 },
             attributes_per_metric: ConfRange::Inclusive { min: 0, max: 10 },
+            unique_tag_ratio: 0.75,
         }
     }
 }
@@ -220,6 +225,10 @@ impl Config {
             return Err("attributes_per_metric minimum cannot be greater than maximum".to_string());
         }
 
+        if !(0.01_f32..=1.0_f32).contains(&self.contexts.unique_tag_ratio) {
+            return Err("unique_tag_ratio must be between 0.01 and 1.0".to_string());
+        }
+
         let min_contexts = match self.contexts.total_contexts {
             ConfRange::Constant(n) => n,
             ConfRange::Inclusive { min, .. } => min,
@@ -570,6 +579,7 @@ mod test {
                     attributes_per_scope: ConfRange::Constant(attributes_per_scope),
                     metrics_per_scope: ConfRange::Constant(metrics_per_scope),
                     attributes_per_metric: ConfRange::Constant(attributes_per_metric),
+                    unique_tag_ratio: 0.75,
                 },
                 ..Default::default()
             };
@@ -614,6 +624,7 @@ mod test {
                     attributes_per_scope: ConfRange::Constant(attributes_per_scope),
                     metrics_per_scope: ConfRange::Constant(metrics_per_scope),
                     attributes_per_metric: ConfRange::Constant(attributes_per_metric),
+                    unique_tag_ratio: 0.75,
                 },
                 ..Default::default()
             };
@@ -661,6 +672,7 @@ mod test {
                     attributes_per_scope: ConfRange::Constant(attributes_per_scope),
                     metrics_per_scope: ConfRange::Constant(metrics_per_scope),
                     attributes_per_metric: ConfRange::Constant(attributes_per_metric),
+                    unique_tag_ratio: 0.75,
                 },
                 ..Default::default()
             };
@@ -707,6 +719,7 @@ mod test {
                     attributes_per_scope: ConfRange::Constant(attributes_per_scope),
                     metrics_per_scope: ConfRange::Constant(metrics_per_scope),
                     attributes_per_metric: ConfRange::Constant(attributes_per_metric),
+                    unique_tag_ratio: 0.75,
                 },
                 ..Default::default()
             };
@@ -739,6 +752,7 @@ mod test {
                 attributes_per_scope: ConfRange::Constant(1),
                 metrics_per_scope: ConfRange::Constant(3),
                 attributes_per_metric: ConfRange::Constant(2),
+                unique_tag_ratio: 0.75,
             },
             ..Default::default()
         };
@@ -782,6 +796,7 @@ mod test {
                     attributes_per_scope: ConfRange::Constant(attributes_per_scope),
                     metrics_per_scope: ConfRange::Constant(metrics_per_scope),
                     attributes_per_metric: ConfRange::Constant(attributes_per_metric),
+                    unique_tag_ratio: 0.75,
                 },
                 ..Default::default()
             };
@@ -926,6 +941,7 @@ mod test {
                     attributes_per_scope: ConfRange::Constant(attributes_per_scope),
                     metrics_per_scope: ConfRange::Constant(metrics_per_scope),
                     attributes_per_metric: ConfRange::Constant(attributes_per_metric),
+                    unique_tag_ratio: 0.75,
                 },
                 ..Default::default()
             };
@@ -973,6 +989,7 @@ mod test {
                     attributes_per_scope: ConfRange::Constant(attributes_per_scope),
                     metrics_per_scope: ConfRange::Constant(metrics_per_scope),
                     attributes_per_metric: ConfRange::Constant(attributes_per_metric),
+                    unique_tag_ratio: 0.75,
                 },
                 ..Default::default()
             };
@@ -1055,6 +1072,7 @@ mod test {
                     attributes_per_scope: ConfRange::Constant(attributes_per_scope),
                     metrics_per_scope: ConfRange::Constant(metrics_per_scope),
                     attributes_per_metric: ConfRange::Constant(attributes_per_metric),
+                    unique_tag_ratio: 0.75,
                 },
                 metric_weights: super::MetricWeights {
                     gauge: 0,   // Only generate sum metrics
@@ -1095,6 +1113,7 @@ mod test {
                     attributes_per_scope: ConfRange::Constant(attributes_per_scope),
                     metrics_per_scope: ConfRange::Constant(metrics_per_scope),
                     attributes_per_metric: ConfRange::Constant(attributes_per_metric),
+                    unique_tag_ratio: 0.75,
                 },
                 metric_weights: super::MetricWeights {
                     gauge: 0,   // Only generate sum metrics
@@ -1217,6 +1236,7 @@ mod test {
                 attributes_per_scope: ConfRange::Constant(0),
                 metrics_per_scope: ConfRange::Inclusive { min: 1, max: 20 },
                 attributes_per_metric: ConfRange::Inclusive { min: 0, max: 10 },
+                unique_tag_ratio: 0.75,
             },
             ..Default::default()
         };
diff --git a/lading_payload/src/opentelemetry/metric/templates.rs b/lading_payload/src/opentelemetry/metric/templates.rs
index 997ef9213..9a9effb37 100644
--- a/lading_payload/src/opentelemetry/metric/templates.rs
+++ b/lading_payload/src/opentelemetry/metric/templates.rs
@@ -18,7 +18,7 @@ use rand::{
 use tracing::debug;
 
 use super::{Config, UnitGenerator};
-use crate::opentelemetry::common::{GeneratorError, TagGenerator, UNIQUE_TAG_RATIO, templates};
+use crate::opentelemetry::common::{GeneratorError, TagGenerator, templates};
 use crate::{Error, Generator, common::config::ConfRange, common::strings};
 
 pub(crate) type Pool = templates::Pool<ResourceMetrics, ResourceTemplateGenerator>;
@@ -104,7 +104,7 @@ impl MetricTemplateGenerator {
             ConfRange::Inclusive { min: 3, max: 32 },
             config.contexts.total_contexts.end() as usize,
             str_pool,
-            UNIQUE_TAG_RATIO,
+            config.contexts.unique_tag_ratio,
         )?;
 
         Ok(Self {
@@ -307,7 +307,7 @@ impl ScopeTemplateGenerator {
             ConfRange::Inclusive { min: 3, max: 32 },
             config.contexts.total_contexts.end() as usize,
             str_pool,
-            UNIQUE_TAG_RATIO,
+            config.contexts.unique_tag_ratio,
         )?;
 
         Ok(Self {
@@ -425,7 +425,7 @@ impl ResourceTemplateGenerator {
             ConfRange::Inclusive { min: 3, max: 32 },
             config.contexts.total_contexts.end() as usize,
             &Rc::clone(str_pool),
-            UNIQUE_TAG_RATIO,
+            config.contexts.unique_tag_ratio,
         )?;
 
         Ok(Self {