French has one set of words for both this and that. Like le and la, they agree with the noun:

Form	Used with	Example
ce	a masculine noun	ce pull — this / that jumper
cet	a masculine noun starting with a vowel or silent h	cet été — this summer; cet homme — this man
cette	a feminine noun	cette robe — this / that dress
ces	any plural	ces chaussures — these / those shoes

Cet and cette sound exactly the same — the difference is only in writing. Ces sounds like English say, and links up with a following vowel: ces‿amis ("say-z-amee").