How wide is the Red Sea where the Israelites crossed?

The importance of the parting of the Red Sea is that this one event is the final act in God’s delivering His people from slavery in Egypt. The exodus from Egypt and the parting of the Red Sea is the single greatest act of salvation in the Old Testament, and it is continually recalled to represent God’s saving power. The events of the exodus, including the parting and crossing of the Red Sea, are immortalized in the Psalms as Israel brings to remembrance God’s saving works in their worship (e.g., Psalm 66:6; 78:13; 106:9; 136:13).

The passing through the Red Sea is used as a symbol of the believer’s identification with the death, burial, and resurrection of the Christ. “Moreover, brethren, I would not that ye should be ignorant, how that all our fathers were under the cloud, and all passed through the sea; And were all baptized unto Moses in the cloud and in the sea; And did all eat the same spiritual meat; And did all drink the same spiritual drink: for they drank of that spiritual Rock that followed them: and that Rock was Christ.” 1 Corinthians 10:1–4

Paul is giving the exodus from Egypt a Christological reading; he is making the connection between the exodus from Egypt and salvation in Christ. Notice how Paul says “all were baptized unto Moses.” Just as the Israelites were “baptized unto Moses,” so too are Christians baptized into Christ:

“Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.”Romans 6:4

The parting of the Red Sea not only finalized God’s redemption of His people from slavery in Egypt, but it also prefigured the greater spiritual reality of God’s redemption of His people from slavery to sin through the work of Christ.

The Red Sea separates the coasts of Egypt, Sudan, and Eritrea to the west from those of Saudi Arabia and Yemen to the east. Its maximum width is 190 miles, its greatest depth 9,974 feet (3,040 metres), and its area approximately 174,000 square miles (450,000 square km).

The Gulf of Suez, the northern end of the Red Sea is roughly where Moses and the Israelites are said to have crossed. Gulf of Suez, Arabic ”Khalīj As-suways”, is the northwestern arm of the Red Sea between Africa proper (west) and the Sinai Peninsula (east) of Egypt. The length of the gulf, from its mouth at the Strait of Jubal to its head at the city of Suez, is 195 miles (314 km), and it varies in width from 12 to 20 miles (19 to 32 km). Its 230 feet deep.