diff --git a/src/app/dialogs/tools/dialogdetail.cpp b/src/app/dialogs/tools/dialogdetail.cpp
index 4605084a4..d8ca3604f 100644
--- a/src/app/dialogs/tools/dialogdetail.cpp
+++ b/src/app/dialogs/tools/dialogdetail.cpp
@@ -35,6 +35,7 @@
 #include "../../geometry/vsplinepath.h"
 #include "../../container/vcontainer.h"
 #include "../../libs/ifc/xml/vdomdocument.h"
+#include "../../xml/vabstractmeasurements.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
@@ -51,6 +52,9 @@ DialogDetail::DialogDetail(const VContainer *data, const quint32 &toolId, QWidge
     ui.labelUnitX->setText(VDomDocument::UnitsToStr(qApp->patternUnit(), true));
     ui.labelUnitY->setText(VDomDocument::UnitsToStr(qApp->patternUnit(), true));
 
+    // Default value for seam allowence is 1 cm. But pattern have different units, so just set 1 in dialog not enough.
+    ui.doubleSpinBoxSeams->setValue(VAbstractMeasurements::UnitConvertor(1, Unit::Cm, qApp->patternUnit()));
+
     bOk = ui.buttonBox->button(QDialogButtonBox::Ok);
     SCASSERT(bOk != nullptr);
     connect(bOk, &QPushButton::clicked, this, &DialogTool::DialogAccepted);