Dolly Regular, Italic and Bold have two styles of figures:
Proportinal Non-lining Figures (also known as old-style or text figures) which blend in with longer, latin text settings by sharing the characteristics of the lowercase alphabet: their widths vary, and they descend below the baseline or ascend above the x-height. Book typography in particular benefits greatly from non-lining figures.
Proportional Lining Figures have varying widths but equal in height with capital letters. These figures are practical when numeral information needs more attention: use them in headlines, price lists, invoices etc.
Next to these figure styles Dolly Small Caps font comes with Tabular Lining Figures. All figures and all figure related characters (like monetary and mathematical characters) share the same width and align with the small cap height. This makes them useable for table settings in annual reports and other number-heavy situations.