diff --git a/web/static/numerus.css b/web/static/numerus.css
index f65038b..e15b1b4 100644
--- a/web/static/numerus.css
+++ b/web/static/numerus.css
@@ -260,6 +260,10 @@ input.width-2x {
 	min-width: 60.95rem;
 }
 
+.input .width-fixed {
+	max-width: 30rem;
+}
+
 .input input::placeholder {
 	color: transparent;
 }
diff --git a/web/template/tax-details.html b/web/template/tax-details.html
index 9381037..f8a3db4 100644
--- a/web/template/tax-details.html
+++ b/web/template/tax-details.html
@@ -44,7 +44,7 @@
 						</div>
 
 						<div class="input">
-							<select id="country" name="country">
+							<select id="country" name="country" class="width-fixed">
 								{{- range $country := .Countries }}
 								<option value="{{ .Code }}" {{ if eq .Code $.CountryCode }}selected="selected"{{ end }}>{{ .Name }}</option>
 								{{- end }}