diff --git a/pkg/koyeb/renderer/format.go b/pkg/koyeb/renderer/format.go
index e7886f16..8ada81eb 100644
--- a/pkg/koyeb/renderer/format.go
+++ b/pkg/koyeb/renderer/format.go
@@ -42,7 +42,37 @@ func FormatID(fullId string, full bool) string {
 	return fullId[:8]
 }
 
-func FormatSize(size int64) string {
+type Size interface {
+	GetSize() int64
+}
+
+type ByteSize int64
+
+func (b ByteSize) GetSize() int64 {
+	return int64(b)
+}
+
+type KBSize int64
+
+func (k KBSize) GetSize() int64 {
+	return int64(k) * 1024
+}
+
+type MBSize int64
+
+func (m MBSize) GetSize() int64 {
+	return int64(m) * 1024 * 1024
+}
+
+type GBSize int64
+
+func (g GBSize) GetSize() int64 {
+	return int64(g) * 1024 * 1024 * 1024
+}
+
+func FormatSize(sized Size) string {
+	size := sized.GetSize()
+
 	switch {
 	case size > 1024*1024*1024:
 		return fmt.Sprintf("%.2fG", float64(size)/1024/1024/1024)
diff --git a/pkg/koyeb/volumes_get.go b/pkg/koyeb/volumes_get.go
index 4ec40b1d..52b4bce7 100644
--- a/pkg/koyeb/volumes_get.go
+++ b/pkg/koyeb/volumes_get.go
@@ -65,7 +65,7 @@ func (r *GetVolumeReply) Fields() []map[string]string {
 		"region":     item.GetRegion(),
 		"status":     formatVolumeStatus(item.GetStatus()),
 		"type":       formatVolumeType(item.GetBackingStore()),
-		"size":       renderer.FormatSize(item.GetMaxSize()),
+		"size":       renderer.FormatSize(renderer.MBSize(item.GetMaxSize())),
 		"read_only":  fmt.Sprintf("%t", item.GetReadOnly()),
 		"created_at": renderer.FormatTime(item.GetCreatedAt()),
 		"updated_at": renderer.FormatTime(item.GetUpdatedAt()),
diff --git a/pkg/koyeb/volumes_list.go b/pkg/koyeb/volumes_list.go
index 3b693ce7..08ad078f 100644
--- a/pkg/koyeb/volumes_list.go
+++ b/pkg/koyeb/volumes_list.go
@@ -76,7 +76,7 @@ func (r *ListVolumesReply) Fields() []map[string]string {
 			"region":     item.GetRegion(),
 			"status":     formatVolumeStatus(item.GetStatus()),
 			"type":       formatVolumeType(item.GetBackingStore()),
-			"size":       renderer.FormatSize(item.GetMaxSize()),
+			"size":       renderer.FormatSize(renderer.MBSize(item.GetMaxSize())),
 			"read_only":  fmt.Sprintf("%t", item.GetReadOnly()),
 			"created_at": renderer.FormatTime(item.GetCreatedAt()),
 			"updated_at": renderer.FormatTime(item.GetUpdatedAt()),