Looking on the internet deeply has found these results:

This pencil is theirs. is the most popular phrase on the web.

These pencil are theirs. 10 results on the web	This pencil is theirs. 13 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Estos asientos son vuestros. Estos asientos son suyos. Theirs. Play. Theirs, suyo/ a, suyos/as (de ellos), This pencil is theirs. Play. This pencil is theirs. Este l�piz�... 8 Oct 2014 ... Theirs suyo/a, suyos/as (de ellos) This pencil is theirs. Este l�piz es de ellos. Pronombres reflexivos (en funci�n de pronombre) Ejemplo�... This pencil is theirs. Este l�piz es de ellos. Pronombres reflexivos (en funci�n de pronombre), Ejemplo, Traducci�n ejemplo. Myself. Play. Myself, yo mismo, a mi�...

These pencil are theirs.

10 results on the web

This pencil is theirs.

13 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Estos asientos son vuestros. Estos asientos son suyos. Theirs. Play. Theirs, suyo/ a, suyos/as (de ellos), This pencil is theirs. Play. This pencil is theirs. Este l�piz�...
8 Oct 2014 ... Theirs suyo/a, suyos/as (de ellos) This pencil is theirs. Este l�piz es de ellos. Pronombres reflexivos (en funci�n de pronombre) Ejemplo�...
This pencil is theirs. Este l�piz es de ellos. Pronombres reflexivos (en funci�n de pronombre), Ejemplo, Traducci�n ejemplo. Myself. Play. Myself, yo mismo, a mi�...