diff --git a/internal/infrastructure/middleware/metrics.go b/internal/infrastructure/middleware/metrics.go
index 60024615..14bbd1c9 100644
--- a/internal/infrastructure/middleware/metrics.go
+++ b/internal/infrastructure/middleware/metrics.go
@@ -2,11 +2,14 @@ package middleware
 
 import (
 	"errors"
+	"log/slog"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/labstack/echo/v4"
 	echo_middleware "github.com/labstack/echo/v4/middleware"
+	"github.com/podengo-project/idmsvc-backend/internal/infrastructure/context"
 	"github.com/podengo-project/idmsvc-backend/internal/metrics"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -40,6 +43,8 @@ func MetricsMiddlewareWithConfig(config *MetricsConfig) echo.MiddlewareFunc {
 
 			err := next(ctx)
 
+			logger := context.LogFromCtx(ctx.Request().Context())
+
 			method := ctx.Request().Method
 			path := MatchedRoute(ctx)
 			status := ctx.Response().Status
@@ -50,6 +55,25 @@ func MetricsMiddlewareWithConfig(config *MetricsConfig) echo.MiddlewareFunc {
 				status = httpErr.Code
 			}
 			statusStr := strconv.Itoa(status)
+			headerBuf := strings.Builder{}
+			headerSize := 0.0
+			if errHeaderBuf := ctx.Request().Header.Write(&headerBuf); errHeaderBuf == nil {
+				headerSize = float64(len(headerBuf.String()))
+				config.Metrics.HTTPRequestHeaderSize.WithLabelValues(statusStr, method, path).Observe(headerSize)
+			} else {
+				logger.Warn("writing headers in string buffer",
+					slog.String("err", errHeaderBuf.Error()),
+				)
+			}
+			bodySize := float64(ctx.Request().ContentLength)
+			config.Metrics.HTTPRequestBodySize.WithLabelValues(statusStr, method, path).Observe(bodySize)
+			logger.Debug("measured request size",
+				slog.String("status", statusStr),
+				slog.String("method", method),
+				slog.String("path", path),
+				slog.Float64("header_size", headerSize),
+				slog.Float64("body_size", bodySize),
+			)
 
 			config.Metrics.HTTPRequestDuration.WithLabelValues(statusStr, method, path).Observe(time.Since(start).Seconds())
 
diff --git a/internal/infrastructure/middleware/metrics_test.go b/internal/infrastructure/middleware/metrics_test.go
index 4e808ce6..65858d78 100644
--- a/internal/infrastructure/middleware/metrics_test.go
+++ b/internal/infrastructure/middleware/metrics_test.go
@@ -69,6 +69,7 @@ func TestMetricsMiddlewareWithConfigCreation(t *testing.T) {
 	}
 
 	e := echo.New()
+	e.Use(ContextLogConfig(&LogConfig{}))
 	m := MetricsMiddlewareWithConfig(config)
 	e.Use(m)
 	path := "/api/idmsvc/v1/domains"
diff --git a/internal/metrics/metrics.go b/internal/metrics/metrics.go
index e1ef3eaf..8b9c0166 100644
--- a/internal/metrics/metrics.go
+++ b/internal/metrics/metrics.go
@@ -13,8 +13,12 @@ const (
 
 // Metrics holds all the Prometheus metrics for the application
 type Metrics struct {
-	// HTTPRequestDuration is a histogram that measures the duration of HTTP requests
+	// HTTPRequestDuration is a histogram that measures the duration of the HTTP requests
 	HTTPRequestDuration *prometheus.HistogramVec
+	// HTTPRequestHeaderSize is a histogram that measures the size of the HTTP request headers.
+	HTTPRequestHeaderSize *prometheus.HistogramVec
+	// HTTPRequestBodySize is a histogram that measures the size of the HTTP request bodys.
+	HTTPRequestBodySize *prometheus.HistogramVec
 
 	reg *prometheus.Registry
 }
@@ -37,6 +41,20 @@ func NewMetrics(reg *prometheus.Registry) *Metrics {
 			Help:      "Duration of HTTP requests",
 			Buckets:   prometheus.ExponentialBuckets(0.0005, 2, 20),
 		}, []string{"status", "method", "path"}),
+		HTTPRequestHeaderSize: promauto.With(reg).NewHistogramVec(prometheus.HistogramOpts{
+			Namespace: NameSpace,
+			Name:      "http_request_header_size",
+			Help:      "Size of the HTTP request headers",
+			// Bucket limited to 32KB
+			Buckets: []float64{1024, 2 * 1024, 4 * 1024, 8 * 1024, 16 * 1024, 32 * 1024},
+		}, []string{"status", "method", "path"}),
+		HTTPRequestBodySize: promauto.With(reg).NewHistogramVec(prometheus.HistogramOpts{
+			Namespace: NameSpace,
+			Name:      "http_request_body_size",
+			Help:      "Size of the HTTP request bodies",
+			// Bucket limited to 128KB
+			Buckets: []float64{1024, 2 * 1024, 4 * 1024, 8 * 1024, 16 * 1024, 32 * 1024, 64 * 1024, 128 * 1024},
+		}, []string{"status", "method", "path"}),
 	}
 
 	reg.MustRegister(collectors.NewBuildInfoCollector())