diff --git a/rMtS_multiblock.py b/rMtS_multiblock.py
index 60254b9a1a4e2123218af2a35651b05facacdf3b..a0a0b5040d4702afb041711ed4393d61a8acb5c2 100644
--- a/rMtS_multiblock.py
+++ b/rMtS_multiblock.py
@@ -38,7 +38,7 @@ if __name__ == '__main__':
         ('participant',''),
         ('session','1'),
         ('grid size',6),  # number of cells per axis -> number of cells = gridXY**2
-        ('sample size',4),  # number of circles (cannot be more than half of the number of cells)
+        ('sample size',6),  # number of circles (cannot be more than half of the number of cells)
         ('sample retention time','[1.5, 1.5]'), # delay after sample
         ('match type', ['single','multi']), # match type ("single" - ~Alekseichuk or "multi" - ~Berger)
         ('match number',1), # number of matches per sample