stick out a mile

stick out a mile AND stand out a mile (to be very obvious) — бросаться в глаза;|| за версту видно; совершенно очевидно; слепому видно; неспециалисту понятно

Example 1: She sticks out a mile with her red hair. (CIDI)

Example 2: Of course he's unhappy - it stands out a mile.

see /recognize a mile off {informal} —
if you can see or recognize something a mile off, you notice it very easily.

Example 1: It's obvious he fancies you - you can see that a mile off.

Example 2: The book's ending is so predictable that you can see it coming a mile away/off. — ...с самого начала было ясно, чем все закончится