Hello The bigl, bigr ans so on are really BIG (huge even) when used with lucida. I think that math-lbr is guilty : it says ****************************************** \def\LBRbig {\@@dobig{8.20}} \def\LBRBig {\@@dobig{10.80}} \def\LBRbigg {\@@dobig{13.42}} \def\LBRBigg {\@@dobig{16.03}} \def\LBRbiggg{\@@dobig{17.72}} \def\LBRBiggg{\@@dobig{21.25}} ****************************************** Shouldn't it says ****************************************** \def\LBRbig {\@@dobig{0.920}} \def\LBRBig {\@@dobig{1.080}} \def\LBRbigg {\@@dobig{1.342}} \def\LBRBigg {\@@dobig{1.603}} \def\LBRbiggg{\@@dobig{1.772}} \def\LBRBiggg{\@@dobig{2.125}} ****************************************** ? There is a strange behavior : if I put \def\LBRbig {\@@dobig{0.930}} big is bigger than Big. How is this possible ?