This question can't be answered exactly without the model of the vehicle. That said, most Oldsmobiles that year have either standard hook end arms or side lock arms. See Sources and Related Links below for videos and wiper blade info.
The 1994 Oldsmobile Delta 88 takes 22" wiper blades on both sides front. See sources and related links below for more information. Since there are over 22 different wiper arm attachments, do not buy wipers just by length only - be sure to lookup exact wiper blade part numbers by vehicle make, model and year for the brand wiper you decide to purchase. This ensures correct length AND correct attachment.
It's a 20 in. wiper blade
The 1994-1997 Ford Aspire take 20" driver side and 16" passenger side replacement windshield wiper blades.
The 1994-1998 Jeep Grand Cherokee takes 20" replacement windshield wiper blades on both sides front and an 10" or 11" rear wiper blade.
The 1994 Chevrolet Cavalier has 17-inch wiper blades on both sides. It is important to consider not only the size of the wiper blades but also the attachment piece as they vary in size as well.
All 1994-2001 Dodge Ram Series Pickups takes 20" replacement windshield wiper blades on both sides front.
All 1994-2001 Dodge Ram Series Pickups take 20" replacement windshield wiper blades on both sides front.
right under the cover that the wiper blades mount to
The 1994 Dodge Caravan/Grand Caravan takes a 22" driver side, 18" passenger side and 18" rear replacement windshield wiper blades.
Assuming that you mean "wiper blade" (blade and frame) which are replaced often rather than "wiper arm" (piece from the spindle at the hood to the wiper blade) which are rarely ever replaced, the 1991-1994 Oldsmobile Bravada has "3/16" side lock" wiper arm attachments and the 1996-2004 Oldsmobile Bravada has the most common hook-end wiper arms. See Sources and Related Links below for installation videos. Also, purchase the replacement blades first and there will be additional instructions/illustrations on the replacement packages. Its very easy.
The 1994 Lexus Ls400 has fairly standard wiper arms so most replacement wiper blades will have step-by-step instructions. This vehicle most likely has hook-end wiper arm attachments or possibly pin attachments. See videos below.
The 1994 Jeep Grand Cherokee takes 20" replacement windshield wiper blades on both sides front and a 10" or 11" wiper on the rear.