Listen here: How to pronounce Czechia :-) https://www.youtube.com/watch?v=PFvNbq-IaaQ¨
Notice: the digraph "cz" comes from the old Czech orthography, typical for West Slavic languages (Czech, Polish), which was taken over by Latin and later also by English for the name to express pronunciation of /t͡ʃ/ (IPA key). In Polish is "cz" digraph still used, in modern Czech (since the standardization of modern orthography in 19th century) is substituted by consonant "č" (however it was introduced already at the break of 14th and 15th century), usually denoting the voiceless postalveolar affricate consonant [t͡ʃ] like the English "ch" in the word chocolate. "Č" originated in Czech language, and from it was adopted in Slovak, Croatian, Macedonian, Slovenian, Bosnian, and Montenegrin. It is used also in Latvian and Lithuanian.
Ice hockey jerseys Česko / Czechia