I just received a coral streamlined MB Danish 20, but it's a tad small for my hands -- I generally prefer the length and girth of the 146/136 unposted. I know there is a No. 25 model in the same production time frame. Does anyone know if it's the same size as the No.20, or is it a size #6 equivalent? I have a Simplo No. 25 safetyfiller that is a lot thicker than the slim Danish 20. Would the same girth apply to the Danish 25? Or should one totally ignore the model conventions because these pens are developed separately in Denmark? Also, what does the '5' in No. 25 mean? Sorry for the barrage of questions. I hope to hear from the experts here. Thanks a lot!