| English | Italian | Spanish | French | German |
|---|---|---|---|---|
| English | Italian | Spanish | French | German |
| bisected | frazionato | bisectado | timbre coupé | halbiert |
| block | blocco | bloque | bloc | block |
| block of 4 | quartina | bloque de 4 | bloc de 4 | viererblock |
| booklet | libretto | carnet | carnet | markenheftchen |
| bottom | basso | fondo | bas | unterrand |
| butterfly | farfalla | mariposa | papillon | Schmetterling |