mwm cursor size

I have problems with cursor size on one of my Xorg screens on CentOS 7. I have two screens. One runs xfce4 window manager and desktop, while another runs mwm window manager. This is a custom setup, which allows a fullscreen Motif application to run on screen with mwm, and other apps on xfce4 screen. I also have special kind of monitor for Motif app, which is 2048x2048 resolution. The problem I have is that all except one cursors are to big on mwm, while on xfce4 they are all normal. Cursor shaped "X" on desktop background is normal size while others are oversized. Here's a picture where an one of oversizeds cursor can be seen: How can I change the size of cursors on mwm screen? I have tried Xcursor.size in Xresources, but with no effect. Here are some more pictures showing cursor sizes. **Another update:** I have tried different window managers to see if cursor size is big there too. KDE, for instance, works fine. However, when I open XTerm window cursors are too big within that window. The app I use also uses Xt and Motif widgets, and also shows big cursors.