Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-133863 and 333-145186) and Form S-8 (No. 333-106977, 333-143129, 333-156492, 333-171453, 333-174153 and 333-211088) of West Pharmaceutical Services, Inc. of our report dated February 21, 2020 relating to the financial statements and financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Philadelphia, Pennsylvania

February 21, 2020